chore(extension): upgrade babel (#669)

.prettierignore

@@ -7,3 +7,4 @@ build
 coverage
 node_modules
 __snapshots__
+dev

extension/.babelrc

@@ -1,4 +1,7 @@
 {
-  "presets": ["es2015", "stage-0", "react"],
-  "plugins": ["add-module-exports", "transform-decorators-legacy"]
+  "presets": ["@babel/preset-env", "@babel/preset-react"],
+  "plugins": [
+    ["@babel/plugin-proposal-decorators", { "legacy": true }],
+    ["@babel/plugin-proposal-class-properties", { "loose": true }]
+  ]
 }

extension/package.json

@@ -31,24 +31,21 @@
   "author": "Mihail Diordiev <zalmoxisus@gmail.com> (https://github.com/zalmoxisus)",
   "license": "MIT",
   "devDependencies": {
-    "babel-cli": "^6.18.0",
-    "babel-core": "^6.21.0",
-    "babel-eslint": "^7.1.0",
-    "babel-loader": "^7.1.1",
-    "babel-plugin-add-module-exports": "^0.2.1",
-    "babel-plugin-react-transform": "^2.0.2",
-    "babel-plugin-transform-decorators-legacy": "^1.2.0",
-    "babel-polyfill": "^6.20.0",
-    "babel-preset-es2015": "^6.18.0",
-    "babel-preset-react": "^6.16.0",
-    "babel-preset-stage-0": "^6.16.0",
-    "babel-register": "^6.18.0",
+    "@babel/cli": "^7.10.5",
+    "@babel/core": "^7.11.1",
+    "@babel/plugin-proposal-class-properties": "^7.10.4",
+    "@babel/plugin-proposal-decorators": "^7.12.1",
+    "@babel/preset-env": "^7.11.0",
+    "@babel/preset-react": "^7.10.4",
+    "@babel/register": "^7.12.1",
+    "babel-eslint": "^10.1.0",
+    "babel-loader": "^8.1.0",
     "chromedriver": "^2.35.0",
     "co-mocha": "^1.1.3",
     "cross-env": "^1.0.8",
     "electron": "^2.0.2",
     "enzyme": "^2.3.0",
-    "eslint": "^1.7.1",
+    "eslint": "^7.6.0",
     "eslint-config-airbnb": "^0.1.0",
     "eslint-plugin-react": "^3.2.3",
     "expect": "^1.20.1",