chore(deps): update dependency rollup to v1.20.3

Author: renovate-bot

package-lock.json

@@ -103,7 +103,7 @@
     "prompt": "1.0.0",
     "replace-in-file": "4.0.0",
     "rimraf": "2.6.3",
-    "rollup": "1.10.1",
+    "rollup": "1.20.3",
     "rollup-plugin-commonjs": "9.3.4",
     "rollup-plugin-json": "4.0.0",
     "rollup-plugin-node-resolve": "4.2.4",