Rewrite gulpfile.js from ES6 to ES5 to prevent error with jenkins
Rewrite gulpfile.js from ES6 to ES5 to prevent error with jenkins

royalrangers-ck/rr-web-app,royalrangers-ck/rr-web-app,royalrangers-ck/rr-web-app,royalrangers-ck/rr-web-app