Merge pull request #3555 from h3poteto/speedup/main-build

Specify transpileOnly to speed up build time for main

.electron-vue/webpack.main.config.js

@@ -19,7 +19,14 @@ let mainConfig = {
       {
         test: /\.ts$/,
         exclude: /node_modules/,
-        loader: 'ts-loader'
+        use: [
+          {
+            loader: 'ts-loader',
+            options: {
+              transpileOnly: true
+            }
+          }
+        ]
       },
       {
         test: /\.js$/,