fix(deps): update dependency mobx to v6.0.4

ui/package-lock.json

@@ -15012,9 +15012,9 @@
       "dev": true
     },
     "mobx": {
-      "version": "6.0.3",
-      "resolved": "https://registry.npmjs.org/mobx/-/mobx-6.0.3.tgz",
-      "integrity": "sha512-DBMd0NXsMn25HJMUAWBndgJ2wRjOJPbpn6wdzUvZW0PVsyTnrw028XwQfzsjnxnKG+bAXGVNb38rvd+1o0G9uQ=="
+      "version": "6.0.4",
+      "resolved": "https://registry.npmjs.org/mobx/-/mobx-6.0.4.tgz",
+      "integrity": "sha512-wT2QJT9tW19VSHo9x7RPKU3z/I2Ps6wUS8Kb1OO+kzmg7UY3n4AkcaYG6jq95Lp1R9ohjC/NGYuT2PtuvBjhFg=="
     },
     "mobx-react-lite": {
       "version": "3.1.5",

ui/package.json

@@ -49,7 +49,7 @@
     "lodash.merge": "4.6.2",
     "lodash.throttle": "4.1.1",
     "lodash.uniqueid": "4.0.1",
-    "mobx": "6.0.3",
+    "mobx": "6.0.4",
     "mobx-react-lite": "3.1.5",
     "mobx-stored": "1.1.0",
     "node-sass": "4.14.1",