Only allow loading .vue from vue-material-design-icons

Signed-off-by: Joas Schilling <coding@schilljs.com>

webpack.common.js

@@ -37,6 +37,7 @@ module.exports = {
 			{
 				test: /\.vue$/,
 				loader: 'vue-loader',
+				exclude: /node_modules(?!(\/|\\)(vue-material-design-icons)(\/|\\))/,
 			},
 			{
 				test: /\.js$/,