chore(package): update rollup-plugin-copy to version 3.2.1

Closes #29

Author: greenkeeper[bot]

package.json

@@ -108,7 +108,7 @@
     "rimraf": "^2.6.1",
     "rollup": "^0.55.0",
     "rollup-plugin-commonjs": "^8.0.2",
-    "rollup-plugin-copy": "^0.2.3",
+    "rollup-plugin-copy": "^3.2.1",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-sourcemaps": "^0.4.2",
     "rollup-plugin-typescript2": "^0.10.0",