yarn upgrade --deep (#2758)

Summary:
Addressing CVE WS-2019-0032:

Affected versions: < 3.13.0
Fixed in version: 3.13.0
Reference: nodeca/js-yaml#475
Pull Request resolved: #2758

Reviewed By: alunyov

Differential Revision: D15702131

Pulled By: kassens

fbshipit-source-id: a81c27bc1f22a8caf788c70db3bc3856b6c4241f

package.json

@@ -37,7 +37,7 @@
     "babel-plugin-tester": "^6.0.1",
     "babel-preset-fbjs": "^3.1.2",
     "chalk": "^2.4.1",
-    "cross-env":"^5.2.0",
+    "cross-env": "^5.2.0",
     "del": "3.0.0",
     "eslint": "5.4.0",
     "eslint-config-fbjs": "2.0.1",