Update babel and associated plugins

Via `yarn upgrade --scope @babel --latest --exact`.

Author: mwiencek

package.json

@@ -8,20 +8,20 @@
   },
   "license": "GPLv2+",
   "dependencies": {
-    "@babel/core": "7.14.3",
-    "@babel/plugin-proposal-class-properties": "7.13.0",
-    "@babel/plugin-proposal-nullish-coalescing-operator": "7.14.2",
-    "@babel/plugin-proposal-optional-chaining": "7.14.2",
+    "@babel/core": "7.15.0",
+    "@babel/plugin-proposal-class-properties": "7.14.5",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "7.14.5",
+    "@babel/plugin-proposal-optional-chaining": "7.14.5",
     "@babel/plugin-syntax-dynamic-import": "7.8.3",
-    "@babel/plugin-transform-flow-strip-types": "7.13.0",
-    "@babel/plugin-transform-react-constant-elements": "7.13.13",
-    "@babel/plugin-transform-react-inline-elements": "7.12.13",
-    "@babel/plugin-transform-react-jsx": "7.14.3",
-    "@babel/plugin-transform-runtime": "7.14.3",
-    "@babel/preset-env": "7.14.2",
-    "@babel/preset-flow": "7.13.13",
-    "@babel/register": "7.13.16",
-    "@babel/runtime": "7.14.0",
+    "@babel/plugin-transform-flow-strip-types": "7.14.5",
+    "@babel/plugin-transform-react-constant-elements": "7.14.5",
+    "@babel/plugin-transform-react-inline-elements": "7.14.5",
+    "@babel/plugin-transform-react-jsx": "7.14.9",
+    "@babel/plugin-transform-runtime": "7.15.0",
+    "@babel/preset-env": "7.15.0",
+    "@babel/preset-flow": "7.14.5",
+    "@babel/register": "7.15.3",
+    "@babel/runtime": "7.15.3",
     "@popperjs/core": "2.5.3",
     "@sentry/browser": "5.10.2",
     "@sentry/node": "5.10.2",
@@ -70,8 +70,8 @@
     "yargs": "3.10.0"
   },
   "devDependencies": {
-    "@babel/cli": "7.14.3",
-    "@babel/eslint-parser": "7.14.3",
+    "@babel/cli": "7.14.8",
+    "@babel/eslint-parser": "7.15.0",
     "babel-plugin-istanbul": "5.2.0",
     "chrome-remote-interface": "0.27.0",
     "eslint": "7.9.0",