chore(deps): update dependency rollup to v1.12.2

Author: renovate-bot

package-lock.json

@@ -39,7 +39,7 @@
     "npm-run-all": "4.1.5",
     "phantomjs-prebuilt": "2.1.16",
     "prettier": "1.17.1",
-    "rollup": "1.12.1",
+    "rollup": "1.12.2",
     "rollup-plugin-commonjs": "10.0.0",
     "rollup-plugin-json": "4.0.0",
     "rollup-plugin-node-resolve": "5.0.0",