Merge pull request #150 from uPortal-contrib/renovate/rollup-2.x

chore(deps): update dependency rollup to v2

Author: ChristianMurphy

package-lock.json

@@ -51,7 +51,7 @@
     "lint-staged": "^10.0.0",
     "node-sass": "^4.13.0",
     "prettier": "^2.0.0",
-    "rollup": "^1.15.2",
+    "rollup": "^2.0.0",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "^10.0.0",
     "rollup-plugin-node-resolve": "^5.0.2",