diff --git a/client/.babelrc b/client/.babelrc
index 5a6095063..9d92eb7b8 100644
--- a/client/.babelrc
+++ b/client/.babelrc
@@ -3,5 +3,5 @@
     "lodash",
     ["transform-object-rest-spread", { "useBuiltIns": true }]
   ],
-  "presets": ["es2015", "react"]
+  "presets": ["env", "react"]
 }
diff --git a/client/package.json b/client/package.json
index 56cf4ff90..77a7afc9e 100644
--- a/client/package.json
+++ b/client/package.json
@@ -56,7 +56,7 @@
     "babel-jest": "21.2.0",
     "babel-loader": "6.4.1",
     "babel-plugin-transform-object-rest-spread": "6.26.0",
-    "babel-preset-es2015": "6.24.1",
+    "babel-preset-env": "1.6.1",
     "babel-preset-react": "6.24.1",
     "clean-webpack-plugin": "0.1.17",
     "css-loader": "0.28.7",
diff --git a/client/yarn.lock b/client/yarn.lock
index 276ab8b5f..a13a1edc9 100644
--- a/client/yarn.lock
+++ b/client/yarn.lock
@@ -425,6 +425,14 @@ babel-generator@^6.18.0, babel-generator@^6.26.0:
     source-map "^0.5.6"
     trim-right "^1.0.1"
 
+babel-helper-builder-binary-assignment-operator-visitor@^6.24.1:
+  version "6.24.1"
+  resolved "https://registry.yarnpkg.com/babel-helper-builder-binary-assignment-operator-visitor/-/babel-helper-builder-binary-assignment-operator-visitor-6.24.1.tgz#cce4517ada356f4220bcae8a02c2b346f9a56664"
+  dependencies:
+    babel-helper-explode-assignable-expression "^6.24.1"
+    babel-runtime "^6.22.0"
+    babel-types "^6.24.1"
+
 babel-helper-builder-react-jsx@^6.24.1:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-helper-builder-react-jsx/-/babel-helper-builder-react-jsx-6.26.0.tgz#39ff8313b75c8b65dceff1f31d383e0ff2a408a0"
@@ -451,6 +459,14 @@ babel-helper-define-map@^6.24.1:
     babel-types "^6.26.0"
     lodash "^4.17.4"
 
+babel-helper-explode-assignable-expression@^6.24.1:
+  version "6.24.1"
+  resolved "https://registry.yarnpkg.com/babel-helper-explode-assignable-expression/-/babel-helper-explode-assignable-expression-6.24.1.tgz#f25b82cf7dc10433c55f70592d5746400ac22caa"
+  dependencies:
+    babel-runtime "^6.22.0"
+    babel-traverse "^6.24.1"
+    babel-types "^6.24.1"
+
 babel-helper-function-name@7.0.0-beta.0:
   version "7.0.0-beta.0"
   resolved "https://registry.yarnpkg.com/babel-helper-function-name/-/babel-helper-function-name-7.0.0-beta.0.tgz#d1b6779b647e5c5c31ebeb05e13b998e4d352d56"
@@ -505,6 +521,16 @@ babel-helper-regex@^6.24.1:
     babel-types "^6.26.0"
     lodash "^4.17.4"
 
+babel-helper-remap-async-to-generator@^6.24.1:
+  version "6.24.1"
+  resolved "https://registry.yarnpkg.com/babel-helper-remap-async-to-generator/-/babel-helper-remap-async-to-generator-6.24.1.tgz#5ec581827ad723fecdd381f1c928390676e4551b"
+  dependencies:
+    babel-helper-function-name "^6.24.1"
+    babel-runtime "^6.22.0"
+    babel-template "^6.24.1"
+    babel-traverse "^6.24.1"
+    babel-types "^6.24.1"
+
 babel-helper-replace-supers@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-helper-replace-supers/-/babel-helper-replace-supers-6.24.1.tgz#bf6dbfe43938d17369a213ca8a8bf74b6a90ab1a"
@@ -574,6 +600,14 @@ babel-plugin-lodash@3.2.11:
     glob "^7.1.1"
     lodash "^4.17.2"
 
+babel-plugin-syntax-async-functions@^6.8.0:
+  version "6.13.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz#cad9cad1191b5ad634bf30ae0872391e0647be95"
+
+babel-plugin-syntax-exponentiation-operator@^6.8.0:
+  version "6.13.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-exponentiation-operator/-/babel-plugin-syntax-exponentiation-operator-6.13.0.tgz#9ee7e8337290da95288201a6a57f4170317830de"
+
 babel-plugin-syntax-export-extensions@^6.8.0:
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-export-extensions/-/babel-plugin-syntax-export-extensions-6.13.0.tgz#70a1484f0f9089a4e84ad44bac353c95b9b12721"
@@ -590,6 +624,18 @@ babel-plugin-syntax-object-rest-spread@^6.13.0, babel-plugin-syntax-object-rest-
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz#fd6536f2bce13836ffa3a5458c4903a597bb3bf5"
 
+babel-plugin-syntax-trailing-function-commas@^6.22.0:
+  version "6.22.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-trailing-function-commas/-/babel-plugin-syntax-trailing-function-commas-6.22.0.tgz#ba0360937f8d06e40180a43fe0d5616fff532cf3"
+
+babel-plugin-transform-async-to-generator@^6.22.0:
+  version "6.24.1"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-async-to-generator/-/babel-plugin-transform-async-to-generator-6.24.1.tgz#6536e378aff6cb1d5517ac0e40eb3e9fc8d08761"
+  dependencies:
+    babel-helper-remap-async-to-generator "^6.24.1"
+    babel-plugin-syntax-async-functions "^6.8.0"
+    babel-runtime "^6.22.0"
+
 babel-plugin-transform-es2015-arrow-functions@^6.22.0, babel-plugin-transform-es2015-arrow-functions@^6.3.13:
   version "6.22.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-arrow-functions/-/babel-plugin-transform-es2015-arrow-functions-6.22.0.tgz#452692cb711d5f79dc7f85e440ce41b9f244d221"
@@ -602,7 +648,7 @@ babel-plugin-transform-es2015-block-scoped-functions@^6.22.0, babel-plugin-trans
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-block-scoping@^6.18.0, babel-plugin-transform-es2015-block-scoping@^6.24.1:
+babel-plugin-transform-es2015-block-scoping@^6.18.0, babel-plugin-transform-es2015-block-scoping@^6.23.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-block-scoping/-/babel-plugin-transform-es2015-block-scoping-6.26.0.tgz#d70f5299c1308d05c12f463813b0a09e73b1895f"
   dependencies:
@@ -612,7 +658,7 @@ babel-plugin-transform-es2015-block-scoping@^6.18.0, babel-plugin-transform-es20
     babel-types "^6.26.0"
     lodash "^4.17.4"
 
-babel-plugin-transform-es2015-classes@^6.18.0, babel-plugin-transform-es2015-classes@^6.24.1:
+babel-plugin-transform-es2015-classes@^6.18.0, babel-plugin-transform-es2015-classes@^6.23.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-classes/-/babel-plugin-transform-es2015-classes-6.24.1.tgz#5a4c58a50c9c9461e564b4b2a3bfabc97a2584db"
   dependencies:
@@ -626,33 +672,33 @@ babel-plugin-transform-es2015-classes@^6.18.0, babel-plugin-transform-es2015-cla
     babel-traverse "^6.24.1"
     babel-types "^6.24.1"
 
-babel-plugin-transform-es2015-computed-properties@^6.24.1, babel-plugin-transform-es2015-computed-properties@^6.3.13:
+babel-plugin-transform-es2015-computed-properties@^6.22.0, babel-plugin-transform-es2015-computed-properties@^6.3.13:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-computed-properties/-/babel-plugin-transform-es2015-computed-properties-6.24.1.tgz#6fe2a8d16895d5634f4cd999b6d3480a308159b3"
   dependencies:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-destructuring@^6.18.0, babel-plugin-transform-es2015-destructuring@^6.22.0:
+babel-plugin-transform-es2015-destructuring@^6.18.0, babel-plugin-transform-es2015-destructuring@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-destructuring/-/babel-plugin-transform-es2015-destructuring-6.23.0.tgz#997bb1f1ab967f682d2b0876fe358d60e765c56d"
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-duplicate-keys@^6.24.1, babel-plugin-transform-es2015-duplicate-keys@^6.6.0:
+babel-plugin-transform-es2015-duplicate-keys@^6.22.0, babel-plugin-transform-es2015-duplicate-keys@^6.6.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-duplicate-keys/-/babel-plugin-transform-es2015-duplicate-keys-6.24.1.tgz#73eb3d310ca969e3ef9ec91c53741a6f1576423e"
   dependencies:
     babel-runtime "^6.22.0"
     babel-types "^6.24.1"
 
-babel-plugin-transform-es2015-for-of@^6.18.0, babel-plugin-transform-es2015-for-of@^6.22.0:
+babel-plugin-transform-es2015-for-of@^6.18.0, babel-plugin-transform-es2015-for-of@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-for-of/-/babel-plugin-transform-es2015-for-of-6.23.0.tgz#f47c95b2b613df1d3ecc2fdb7573623c75248691"
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-function-name@^6.24.1, babel-plugin-transform-es2015-function-name@^6.9.0:
+babel-plugin-transform-es2015-function-name@^6.22.0, babel-plugin-transform-es2015-function-name@^6.9.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-function-name/-/babel-plugin-transform-es2015-function-name-6.24.1.tgz#834c89853bc36b1af0f3a4c5dbaa94fd8eacaa8b"
   dependencies:
@@ -666,7 +712,7 @@ babel-plugin-transform-es2015-literals@^6.22.0, babel-plugin-transform-es2015-li
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-modules-amd@^6.18.0, babel-plugin-transform-es2015-modules-amd@^6.24.1:
+babel-plugin-transform-es2015-modules-amd@^6.18.0, babel-plugin-transform-es2015-modules-amd@^6.22.0, babel-plugin-transform-es2015-modules-amd@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-amd/-/babel-plugin-transform-es2015-modules-amd-6.24.1.tgz#3b3e54017239842d6d19c3011c4bd2f00a00d154"
   dependencies:
@@ -674,7 +720,7 @@ babel-plugin-transform-es2015-modules-amd@^6.18.0, babel-plugin-transform-es2015
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-modules-commonjs@^6.18.0, babel-plugin-transform-es2015-modules-commonjs@^6.24.1:
+babel-plugin-transform-es2015-modules-commonjs@^6.18.0, babel-plugin-transform-es2015-modules-commonjs@^6.23.0, babel-plugin-transform-es2015-modules-commonjs@^6.24.1:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-commonjs/-/babel-plugin-transform-es2015-modules-commonjs-6.26.0.tgz#0d8394029b7dc6abe1a97ef181e00758dd2e5d8a"
   dependencies:
@@ -683,7 +729,7 @@ babel-plugin-transform-es2015-modules-commonjs@^6.18.0, babel-plugin-transform-e
     babel-template "^6.26.0"
     babel-types "^6.26.0"
 
-babel-plugin-transform-es2015-modules-systemjs@^6.18.0, babel-plugin-transform-es2015-modules-systemjs@^6.24.1:
+babel-plugin-transform-es2015-modules-systemjs@^6.18.0, babel-plugin-transform-es2015-modules-systemjs@^6.23.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-systemjs/-/babel-plugin-transform-es2015-modules-systemjs-6.24.1.tgz#ff89a142b9119a906195f5f106ecf305d9407d23"
   dependencies:
@@ -691,7 +737,7 @@ babel-plugin-transform-es2015-modules-systemjs@^6.18.0, babel-plugin-transform-e
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-modules-umd@^6.18.0, babel-plugin-transform-es2015-modules-umd@^6.24.1:
+babel-plugin-transform-es2015-modules-umd@^6.18.0, babel-plugin-transform-es2015-modules-umd@^6.23.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-umd/-/babel-plugin-transform-es2015-modules-umd-6.24.1.tgz#ac997e6285cd18ed6176adb607d602344ad38468"
   dependencies:
@@ -699,14 +745,14 @@ babel-plugin-transform-es2015-modules-umd@^6.18.0, babel-plugin-transform-es2015
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-plugin-transform-es2015-object-super@^6.24.1, babel-plugin-transform-es2015-object-super@^6.3.13:
+babel-plugin-transform-es2015-object-super@^6.22.0, babel-plugin-transform-es2015-object-super@^6.3.13:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-object-super/-/babel-plugin-transform-es2015-object-super-6.24.1.tgz#24cef69ae21cb83a7f8603dad021f572eb278f8d"
   dependencies:
     babel-helper-replace-supers "^6.24.1"
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-parameters@^6.18.0, babel-plugin-transform-es2015-parameters@^6.24.1:
+babel-plugin-transform-es2015-parameters@^6.18.0, babel-plugin-transform-es2015-parameters@^6.23.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-parameters/-/babel-plugin-transform-es2015-parameters-6.24.1.tgz#57ac351ab49caf14a97cd13b09f66fdf0a625f2b"
   dependencies:
@@ -717,7 +763,7 @@ babel-plugin-transform-es2015-parameters@^6.18.0, babel-plugin-transform-es2015-
     babel-traverse "^6.24.1"
     babel-types "^6.24.1"
 
-babel-plugin-transform-es2015-shorthand-properties@^6.18.0, babel-plugin-transform-es2015-shorthand-properties@^6.24.1:
+babel-plugin-transform-es2015-shorthand-properties@^6.18.0, babel-plugin-transform-es2015-shorthand-properties@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-shorthand-properties/-/babel-plugin-transform-es2015-shorthand-properties-6.24.1.tgz#24f875d6721c87661bbd99a4622e51f14de38aa0"
   dependencies:
@@ -730,7 +776,7 @@ babel-plugin-transform-es2015-spread@^6.22.0, babel-plugin-transform-es2015-spre
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-sticky-regex@^6.24.1, babel-plugin-transform-es2015-sticky-regex@^6.3.13:
+babel-plugin-transform-es2015-sticky-regex@^6.22.0, babel-plugin-transform-es2015-sticky-regex@^6.3.13:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-sticky-regex/-/babel-plugin-transform-es2015-sticky-regex-6.24.1.tgz#00c1cdb1aca71112cdf0cf6126c2ed6b457ccdbc"
   dependencies:
@@ -744,13 +790,13 @@ babel-plugin-transform-es2015-template-literals@^6.22.0, babel-plugin-transform-
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-typeof-symbol@^6.18.0, babel-plugin-transform-es2015-typeof-symbol@^6.22.0:
+babel-plugin-transform-es2015-typeof-symbol@^6.18.0, babel-plugin-transform-es2015-typeof-symbol@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-typeof-symbol/-/babel-plugin-transform-es2015-typeof-symbol-6.23.0.tgz#dec09f1cddff94b52ac73d505c84df59dcceb372"
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-es2015-unicode-regex@^6.24.1, babel-plugin-transform-es2015-unicode-regex@^6.3.13:
+babel-plugin-transform-es2015-unicode-regex@^6.22.0, babel-plugin-transform-es2015-unicode-regex@^6.3.13:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-unicode-regex/-/babel-plugin-transform-es2015-unicode-regex-6.24.1.tgz#d38b12f42ea7323f729387f18a7c5ae1faeb35e9"
   dependencies:
@@ -758,6 +804,14 @@ babel-plugin-transform-es2015-unicode-regex@^6.24.1, babel-plugin-transform-es20
     babel-runtime "^6.22.0"
     regexpu-core "^2.0.0"
 
+babel-plugin-transform-exponentiation-operator@^6.22.0:
+  version "6.24.1"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-exponentiation-operator/-/babel-plugin-transform-exponentiation-operator-6.24.1.tgz#2ab0c9c7f3098fa48907772bb813fe41e8de3a0e"
+  dependencies:
+    babel-helper-builder-binary-assignment-operator-visitor "^6.24.1"
+    babel-plugin-syntax-exponentiation-operator "^6.8.0"
+    babel-runtime "^6.22.0"
+
 babel-plugin-transform-export-extensions@6.8.0:
   version "6.8.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-export-extensions/-/babel-plugin-transform-export-extensions-6.8.0.tgz#fa80ff655b636549431bfd38f6b817bd82e47f5b"
@@ -807,7 +861,7 @@ babel-plugin-transform-react-jsx@^6.24.1, babel-plugin-transform-react-jsx@^6.3.
     babel-plugin-syntax-jsx "^6.8.0"
     babel-runtime "^6.22.0"
 
-babel-plugin-transform-regenerator@^6.16.0, babel-plugin-transform-regenerator@^6.24.1:
+babel-plugin-transform-regenerator@^6.16.0, babel-plugin-transform-regenerator@^6.22.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-regenerator/-/babel-plugin-transform-regenerator-6.26.0.tgz#e0703696fbde27f0a3efcacf8b4dca2f7b3a8f2f"
   dependencies:
@@ -828,6 +882,41 @@ babel-polyfill@6.26.0, babel-polyfill@^6.26.0:
     core-js "^2.5.0"
     regenerator-runtime "^0.10.5"
 
+babel-preset-env@1.6.1:
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/babel-preset-env/-/babel-preset-env-1.6.1.tgz#a18b564cc9b9afdf4aae57ae3c1b0d99188e6f48"
+  dependencies:
+    babel-plugin-check-es2015-constants "^6.22.0"
+    babel-plugin-syntax-trailing-function-commas "^6.22.0"
+    babel-plugin-transform-async-to-generator "^6.22.0"
+    babel-plugin-transform-es2015-arrow-functions "^6.22.0"
+    babel-plugin-transform-es2015-block-scoped-functions "^6.22.0"
+    babel-plugin-transform-es2015-block-scoping "^6.23.0"
+    babel-plugin-transform-es2015-classes "^6.23.0"
+    babel-plugin-transform-es2015-computed-properties "^6.22.0"
+    babel-plugin-transform-es2015-destructuring "^6.23.0"
+    babel-plugin-transform-es2015-duplicate-keys "^6.22.0"
+    babel-plugin-transform-es2015-for-of "^6.23.0"
+    babel-plugin-transform-es2015-function-name "^6.22.0"
+    babel-plugin-transform-es2015-literals "^6.22.0"
+    babel-plugin-transform-es2015-modules-amd "^6.22.0"
+    babel-plugin-transform-es2015-modules-commonjs "^6.23.0"
+    babel-plugin-transform-es2015-modules-systemjs "^6.23.0"
+    babel-plugin-transform-es2015-modules-umd "^6.23.0"
+    babel-plugin-transform-es2015-object-super "^6.22.0"
+    babel-plugin-transform-es2015-parameters "^6.23.0"
+    babel-plugin-transform-es2015-shorthand-properties "^6.22.0"
+    babel-plugin-transform-es2015-spread "^6.22.0"
+    babel-plugin-transform-es2015-sticky-regex "^6.22.0"
+    babel-plugin-transform-es2015-template-literals "^6.22.0"
+    babel-plugin-transform-es2015-typeof-symbol "^6.23.0"
+    babel-plugin-transform-es2015-unicode-regex "^6.22.0"
+    babel-plugin-transform-exponentiation-operator "^6.22.0"
+    babel-plugin-transform-regenerator "^6.22.0"
+    browserslist "^2.1.2"
+    invariant "^2.2.2"
+    semver "^5.3.0"
+
 babel-preset-es2015@6.18.0:
   version "6.18.0"
   resolved "https://registry.yarnpkg.com/babel-preset-es2015/-/babel-preset-es2015-6.18.0.tgz#b8c70df84ec948c43dcf2bf770e988eb7da88312"
@@ -857,35 +946,6 @@ babel-preset-es2015@6.18.0:
     babel-plugin-transform-es2015-unicode-regex "^6.3.13"
     babel-plugin-transform-regenerator "^6.16.0"
 
-babel-preset-es2015@6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-preset-es2015/-/babel-preset-es2015-6.24.1.tgz#d44050d6bc2c9feea702aaf38d727a0210538939"
-  dependencies:
-    babel-plugin-check-es2015-constants "^6.22.0"
-    babel-plugin-transform-es2015-arrow-functions "^6.22.0"
-    babel-plugin-transform-es2015-block-scoped-functions "^6.22.0"
-    babel-plugin-transform-es2015-block-scoping "^6.24.1"
-    babel-plugin-transform-es2015-classes "^6.24.1"
-    babel-plugin-transform-es2015-computed-properties "^6.24.1"
-    babel-plugin-transform-es2015-destructuring "^6.22.0"
-    babel-plugin-transform-es2015-duplicate-keys "^6.24.1"
-    babel-plugin-transform-es2015-for-of "^6.22.0"
-    babel-plugin-transform-es2015-function-name "^6.24.1"
-    babel-plugin-transform-es2015-literals "^6.22.0"
-    babel-plugin-transform-es2015-modules-amd "^6.24.1"
-    babel-plugin-transform-es2015-modules-commonjs "^6.24.1"
-    babel-plugin-transform-es2015-modules-systemjs "^6.24.1"
-    babel-plugin-transform-es2015-modules-umd "^6.24.1"
-    babel-plugin-transform-es2015-object-super "^6.24.1"
-    babel-plugin-transform-es2015-parameters "^6.24.1"
-    babel-plugin-transform-es2015-shorthand-properties "^6.24.1"
-    babel-plugin-transform-es2015-spread "^6.22.0"
-    babel-plugin-transform-es2015-sticky-regex "^6.24.1"
-    babel-plugin-transform-es2015-template-literals "^6.22.0"
-    babel-plugin-transform-es2015-typeof-symbol "^6.22.0"
-    babel-plugin-transform-es2015-unicode-regex "^6.24.1"
-    babel-plugin-transform-regenerator "^6.24.1"
-
 babel-preset-flow@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-preset-flow/-/babel-preset-flow-6.23.0.tgz#e71218887085ae9a24b5be4169affb599816c49d"
@@ -1193,7 +1253,7 @@ browserslist@^1.3.6, browserslist@^1.5.2, browserslist@^1.7.6:
     caniuse-db "^1.0.30000639"
     electron-to-chromium "^1.2.7"
 
-browserslist@^2.5.0:
+browserslist@^2.1.2, browserslist@^2.5.0:
   version "2.5.1"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.5.1.tgz#68e4bc536bbcc6086d62843a2ffccea8396821c6"
   dependencies: