copy yarn.lock to /target

Author: LabhanshAgrawal

webpack.config.ts

@@ -41,6 +41,10 @@ const config: webpack.Configuration[] = [
             globOptions: {ignore: ['**/node_modules/**']},
             to: '[name].[ext]'
           },
+          {
+            from: './app/yarn.lock',
+            to: 'yarn.lock'
+          },
           {
             from: './app/keymaps/*.json',
             globOptions: {ignore: ['**/node_modules/**']},