Update

Author: agragregra

package.json

@@ -16,7 +16,7 @@
     "gulp-cache": "^1.0.1",
     "gulp-clean-css": "^3.9.0",
     "gulp-concat": "^2.6.1",
-    "gulp-imagemin": "^3.4.0",
+    "gulp-imagemin": "^4.0.0",
     "gulp-notify": "^3.0.0",
     "gulp-rename": "^1.2.2",
     "gulp-rsync": "0.0.8",