message: chore: use dev mode for tests
diff: @@ -10,6 +10,7 @@ const isTest = ENV === 'test';
  module.exports = function makeWebpackConfig() {
  let config = {
  devtool: 'inline-source-map',
  + mode: 'development',
  output: {},
  resolve: {
  extensions: ['.ts', '.js', '.json', '.css', '.scss', '.html']
  