fix resourcePath not passed in via webpack

Author: bn-jcundill

lib/loader.js

@@ -25,7 +25,7 @@ const createCucumber = (filePath, cucumberJson, spec, toRequire) =>
   createTestsFromFeature(filePath, spec);
   `;
 
-module.exports = (spec, filePath = this.resourcePath) => {
+module.exports = function(spec, filePath = this.resourcePath) {
   const explorer = cosmiconfig("cypress-cucumber-preprocessor", { sync: true });
   const loaded = explorer.load();
   const cucumberJson =