add marker for vue-style-loader to detect whether a request is made by a vue file

Author: yyx990803

lib/loader.js

@@ -199,6 +199,8 @@ module.exports = function (content) {
     var styleCompiler = ''
     if (type === 'styles') {
       styleCompiler = styleCompilerPath + '?' + JSON.stringify({
+        // a marker for vue-style-loader to know that this is an import from a vue file
+        vue: true,
         id: moduleId,
         scoped: !!scoped,
         hasInlineConfig: !!query.postcss