Bump @babel/preset-env from 7.4.1 to 7.4.2 in /js

Bumps [@babel/preset-env](https://github.com/babel/babel) from 7.4.1 to 7.4.2.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.4.1...v7.4.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>

js/package-lock.json

@@ -141,34 +141,28 @@
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@@ -202,51 +196,6 @@
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@@ -257,27 +206,6 @@
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@@ -390,9 +318,9 @@
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@@ -468,51 +396,6 @@
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@@ -558,12 +420,25 @@
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@@ -1029,9 +882,9 @@
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@@ -1159,9 +1012,9 @@
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@@ -1236,43 +1089,43 @@
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@@ -5795,6 +5648,14 @@
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+        "jsesc": {
+          "version": "0.5.0",
+          "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
+          "integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=",
+          "dev": true
+        }
       }
     },
     "remove-trailing-separator": {

js/package.json

@@ -24,7 +24,7 @@
   "devDependencies": {
     "@babel/core": "^7.4.0",
     "@babel/polyfill": "^7.2.5",
-    "@babel/preset-env": "^7.4.1",
+    "@babel/preset-env": "^7.4.2",
     "babel-loader": "^8.0.5",
     "css-loader": "^2.1.1",
     "karma": "^4.0.1",