chore(package): update rollup to version 1.1.0

Closes #76

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "react-dom": "^16.5.2",
     "react-test-renderer": "^16.5.2",
     "regenerator-runtime": "^0.13.1",
-    "rollup": "^0.67.0",
+    "rollup": "^1.1.0",
     "rollup-plugin-babel": "^4.0.3",
     "rollup-plugin-commonjs": "^9.1.8",
     "rollup-plugin-json": "^3.1.0",