Update dependency rollup-plugin-copy to v2 (#179)

Author: renovate-bot

package.json

@@ -48,7 +48,7 @@
     "prettier": "1.17.0",
     "rimraf": "2.6.3",
     "rollup": "0.67.4",
-    "rollup-plugin-copy": "1.1.0",
+    "rollup-plugin-copy": "2.0.1",
     "tslint": "5.16.0",
     "typescript": "3.4.5"
   },