Merge pull request #257 from conveyal/dev

v4.4.2

Author: trevorgerhardt

package.json

@@ -48,7 +48,7 @@
     "@babel/plugin-proposal-export-namespace-from": "^7.0.0",
     "@babel/plugin-syntax-dynamic-import": "^7.0.0",
     "@babel/plugin-transform-react-display-name": "^7.0.0",
-    "@babel/plugin-transform-runtime": "^7.0.0",
+    "@babel/polyfill": "^7.0.0",
     "@babel/preset-env": "^7.0.0",
     "@babel/preset-flow": "^7.0.0",
     "@babel/preset-react": "^7.0.0",