chore(package): update rollup to version 2.0.5

Closes #60

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "react-dom": "^16.12.0",
     "react-intl": "^2.9.0",
     "react-ocean-forms": "^2.2.0",
-    "rollup": "^1.27.10",
+    "rollup": "^2.0.5",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-filesize": "^6.2.1",
     "rollup-plugin-node-resolve": "^5.2.0",