Bump rollup-plugin-uglify from 3.0.0 to 4.0.0 (KazanExpress#160)

Bump rollup-plugin-uglify from 3.0.0 to 4.0.0

Author: Raiondesu

package-lock.json

@@ -88,7 +88,7 @@
     "rollup-plugin-css-only": "^0.4.0",
     "rollup-plugin-node-resolve": "^4.2.4",
     "rollup-plugin-regenerator": "^0.6.0",
-    "rollup-plugin-uglify": "^3.0.0",
+    "rollup-plugin-uglify": "^4.0.0",
     "rollup-plugin-vue2": "^0.8.0",
     "vue": "^2.5.16",
     "vue-loader": "^15.7.1",