chore(package): update rollup to version 2.10.4

Closes #31

Author: greenkeeper[bot]

package.json

@@ -64,7 +64,7 @@
     "json5": "2.1.0",
     "lint-staged": "8.1.0",
     "prettier": "1.17.0",
-    "rollup": "1.0.1",
+    "rollup": "2.10.4",
     "rollup-plugin-commonjs": "9.2.0",
     "rollup-plugin-json": "3.1.0",
     "rollup-plugin-node-resolve": "4.0.0",