fix build on updated npm modules

.babelrc

@@ -13,6 +13,8 @@
     ["@babel/stage-0", { "decoratorsLegacy": true }]
   ],
   "plugins": [
+	["transform-class-properties"],
+	["transform-react-jsx", { "pragma": "h" }],
   	["transform-object-rest-spread", { "useBuiltIns": true }]
   ]
 }

src/background/webpack.config.production.js

@@ -16,7 +16,15 @@ module.exports = {
 			{
 				test: /\.js$/,
 				exclude: /node_modules/,
-				use: ["babel-loader"]
+				use: {
+					loader: "babel-loader",
+					options: {
+						presets: ['@babel/react'],
+						plugins:[
+							["@babel/plugin-proposal-class-properties",{ "loose": true }],
+							"@babel/plugin-proposal-object-rest-spread"
+						]}
+				}
 			},
 			{
 				test: /\.css$/,