refactor: loaderPath

Author: Aysnine

src/index.js

@@ -1,9 +1,11 @@
+const loaderPath = require.resolve('./lib/injector.js')
+
 // for chainWebpack
 module.exports = function(config, options) {
   config.module
     .rule('vue')
     .use('vue-filename-injector')
-    .loader(require.resolve('./lib/injector.js'))
+    .loader(loaderPath)
     .options(options)
     .after('vue-loader')
     .end()