Merge pull request #67 from caijiehong/patch-1

support webpack 4
diff --git a/src/loader.js b/src/loader.js
index da66030..7ac9481 100644
--- a/src/loader.js
+++ b/src/loader.js
@@ -199,7 +199,7 @@
   if (path.extname(this.resourcePath).match(/\.vue/)) {
     return vueLoader.call(this, source)
   }
-  const options = this.options.weex || {}
+  const options = this._compiler.options.weex || {}
   const customLang = options.lang || {}
   const loaderQuery = loaderUtils.getOptions(this) || {}
   const resourceQuery = this.resourceQuery && loaderUtils.parseQuery(this.resourceQuery) || {}