added babel runtime

Author: avigoldman

packages/heml/package-lock.json

@@ -26,6 +26,7 @@
     "@heml/render": "^1.0.0",
     "@heml/utils": "^1.0.0",
     "@heml/validate": "^1.0.0",
+    "babel-runtime": "^6.26.0",
     "boxen": "^1.2.1",
     "byte-length": "^0.1.1",
     "chalk": "^2.1.0",