Committing manifest V3 version of Reactime with working production and dev environments.

Co-authored-by: Chris LeBrett <[email protected]>
Co-authored-by: Robby Tipton <[email protected]>
Co-authored-by: Joseph Park <[email protected]>
Co-authored-by: David Kim <[email protected]>
Co-authored-by: Kevin HoEun Lee <[email protected]>

Author: 5 people

webpack.config.js

@@ -82,6 +82,7 @@ const config = {
 
 module.exports = (env, argv) => {
   if (argv.mode === 'development') {
+    config.devtool = 'cheap-module-source-map';
     config.plugins.push(
       new ChromeExtensionReloader({
         entries: {