Update babel to latest version 7.8.5

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/25964

app/assets/javascripts/main.js

@@ -69,7 +69,7 @@ if (gon && gon.disable_animations) {
 // inject test utilities if necessary
 if (process.env.NODE_ENV !== 'production' && gon && gon.test_env) {
   disableJQueryAnimations();
-  import(/* webpackMode: "eager" */ './test_utils/');
+  import(/* webpackMode: "eager" */ './test_utils/'); // eslint-disable-line no-unused-expressions
 }
 
 document.addEventListener('beforeunload', () => {

babel.config.js

@@ -18,12 +18,10 @@ const presets = [
 
 // include stage 3 proposals
 const plugins = [
-  '@babel/plugin-syntax-dynamic-import',
   '@babel/plugin-syntax-import-meta',
   '@babel/plugin-proposal-class-properties',
   '@babel/plugin-proposal-json-strings',
   '@babel/plugin-proposal-private-methods',
-  '@babel/plugin-proposal-optional-chaining',
   'lodash',
 ];
 

package.json

@@ -31,14 +31,12 @@
     "webpack-prod": "NODE_OPTIONS=\"--max-old-space-size=3584\" NODE_ENV=production webpack --config config/webpack.config.js"
   },
   "dependencies": {
-    "@babel/core": "^7.6.2",
-    "@babel/plugin-proposal-class-properties": "^7.5.5",
-    "@babel/plugin-proposal-json-strings": "^7.2.0",
-    "@babel/plugin-proposal-optional-chaining": "^7.7.5",
-    "@babel/plugin-proposal-private-methods": "^7.6.0",
-    "@babel/plugin-syntax-dynamic-import": "^7.2.0",
-    "@babel/plugin-syntax-import-meta": "^7.2.0",
-    "@babel/preset-env": "^7.6.2",
+    "@babel/core": "^7.8.4",
+    "@babel/plugin-proposal-class-properties": "^7.8.3",
+    "@babel/plugin-proposal-json-strings": "^7.8.3",
+    "@babel/plugin-proposal-private-methods": "^7.8.3",
+    "@babel/plugin-syntax-import-meta": "^7.8.3",
+    "@babel/preset-env": "^7.8.4",
     "@gitlab/at.js": "^1.5.5",
     "@gitlab/svgs": "^1.101.0",
     "@gitlab/ui": "^9.16.0",
@@ -65,7 +63,7 @@
     "codesandbox-api": "^0.0.20",
     "compression-webpack-plugin": "^3.0.1",
     "copy-webpack-plugin": "^5.0.5",
-    "core-js": "^3.2.1",
+    "core-js": "^3.6.4",
     "cropper": "^2.3.0",
     "css-loader": "^1.0.0",
     "d3": "^4.13.0",
@@ -145,7 +143,7 @@
     "xterm": "^3.5.0"
   },
   "devDependencies": {
-    "@babel/plugin-transform-modules-commonjs": "^7.5.0",
+    "@babel/plugin-transform-modules-commonjs": "^7.8.3",
     "@gitlab/eslint-config": "^3.0.0",
     "@vue/test-utils": "^1.0.0-beta.30",
     "axios-mock-adapter": "^1.15.0",