begin converting WakatimeCore

package.json

@@ -34,10 +34,13 @@
     "react": "^16.2.0",
     "react-dom": "^16.2.0",
     "react-transition-group": "^1.0.0",
-    "webextension-polyfill": "^0.4.0",
     "webextension-polyfill-ts": "^0.22.0"
   },
   "devDependencies": {
+    "@babel/core": "^7.8.7",
+    "@babel/preset-env": "^7.8.7",
+    "@babel/preset-react": "^7.8.3",
+    "@babel/preset-typescript": "^7.8.3",
     "@testing-library/dom": "^7.29.4",
     "@testing-library/jest-dom": "^5.11.9",
     "@testing-library/react": "^11.2.3",
@@ -55,7 +58,9 @@
     "@typescript-eslint/eslint-plugin": "^4.13.0",
     "@typescript-eslint/parser": "^4.13.0",
     "@xarc/run": "^1.0.4",
+    "axios": "^0.21.1",
     "babel-jest": "^22.1.0",
+    "babel-loader": "^8.2.2",
     "browserify": "^17.0.0",
     "chai": "^4.1.2",
     "clean-webpack-plugin": "^3.0.0",
@@ -84,8 +89,6 @@
     "mocha": "^5.0.0",
     "mocha-sinon": "^2.0.0",
     "mocha-traceur": "^2.1.0",
-    "mockzilla": "^0.9.0",
-    "mockzilla-webextension": "^0.9.0",
     "phantomjs": "^2.1.7",
     "popper.js": "^1.14.6",
     "prettier": "^2.2.1",