Merge pull request #915 from prymitive/require-go-1.12

chore(backend): require Go 1.12

.travis.yml

@@ -33,14 +33,14 @@ jobs:
         - travis_retry make mock-assets
       script: make test-go
       after_success:
-        - travis_retry curl -s --fail https://codecov.io/bash | bash -s -- -F backend
+        - travis_retry curl -s --connect-timeout 30 --fail https://codecov.io/bash | bash -s -- -F backend
 
     - stage: Test
       name: Test JavaScript code
       <<: *DEFAULTS_JS
       script: make test-js
       after_success:
-        - travis_retry curl -s --fail https://codecov.io/bash | bash -s -- -F ui
+        - travis_retry curl -s --connect-timeout 30 --fail https://codecov.io/bash | bash -s -- -F ui
 
     # duplicate js test but with a different time zone, to ensure that tests/code work with non-UTC time zone
     - stage: Test
@@ -48,7 +48,7 @@ jobs:
       <<: *DEFAULTS_JS
       script: env TZ=Pacific/Easter make test-js
       after_success:
-        - travis_retry curl -s --fail https://codecov.io/bash | bash -s -- -F ui
+        - travis_retry curl -s --connect-timeout 30 --fail https://codecov.io/bash | bash -s -- -F ui
 
     - stage: Lint
       name: Lint git commit
@@ -191,5 +191,5 @@ jobs:
         - travis_retry docker login -u _ -p "$HEROKU_TOKEN" registry.heroku.com
         - travis_retry docker push registry.heroku.com/karma-demo/web
         # bundled heroku cli doesn't know anything about containers, update it
-        - travis_retry curl -s --fail https://cli-assets.heroku.com/install.sh | sh
+        - travis_retry curl -s --connect-timeout 30 --fail https://cli-assets.heroku.com/install.sh | sh
         - travis_retry /usr/local/bin/heroku container:release web --app karma-demo

go.mod

@@ -1,5 +1,7 @@
 module github.com/prymitive/karma
 
+go 1.12
+
 require (
 	github.com/DeanThompson/ginpprof v0.0.0-20190408070748-3be636683586
 	github.com/blang/semver v3.6.1+incompatible