bump gulp-rename to 2.1.0 (#346)

Author: Arhell

package.json

@@ -16,7 +16,7 @@
     "gulp-imagemin": "^9.1.0",
     "gulp-load-plugins": "^2.0.8",
     "gulp-newer": "^1.4.0",
-    "gulp-rename": "^2.0.0",
+    "gulp-rename": "^2.1.0",
     "gulp-sass": "^6.0.1",
     "gulp-uglify": "^3.0.2",
     "imagemin-pngquant": "^10.0.0",