Update [css-only, uglify] package.json - remove deprecation warn… (#174)

Update [css-only, uglify] package.json - remove deprecation warnings

Author: Raiondesu

package-lock.json

@@ -85,10 +85,10 @@
     "rollup": "^1.23.0",
     "rollup-plugin-babel": "^3.0.4",
     "rollup-plugin-commonjs": "^10.1.0",
-    "rollup-plugin-css-only": "^0.4.0",
+    "rollup-plugin-css-only": "^1.0.0",
     "rollup-plugin-node-resolve": "^4.2.4",
     "rollup-plugin-regenerator": "^0.6.0",
-    "rollup-plugin-uglify": "^4.0.0",
+    "rollup-plugin-uglify": "^6.0.3",
     "rollup-plugin-vue2": "^0.8.0",
     "vue": "^2.5.16",
     "vue-loader": "^15.7.1",