Add babel-runtime to dependency.

Author: cloudwebrtc

package.json

@@ -27,6 +27,7 @@
   "dependencies": {
     "@material-ui/core": "^1.3.1",
     "@material-ui/icons": "^1.1.0",
+    "babel-runtime": "^6.26.0",
     "bowser": "^1.9.4",
     "express": "^4.11.2",
     "open": "0.0.5",