Bump cross-env from 6.0.2 to 6.0.3 (#6105)

Bumps [cross-env](https://github.com/kentcdodds/cross-env) from 6.0.2 to 6.0.3.
- [Release notes](https://github.com/kentcdodds/cross-env/releases)
- [Changelog](https://github.com/kentcdodds/cross-env/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kentcdodds/cross-env/compare/v6.0.2...v6.0.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -71,7 +71,7 @@
     "apollo-utilities": "1.3.2",
     "babel-eslint": "10.0.3",
     "bcrypt-nodejs": "0.0.3",
-    "cross-env": "6.0.2",
+    "cross-env": "6.0.3",
     "deep-diff": "1.0.2",
     "eslint": "6.5.1",
     "eslint-plugin-flowtype": "4.3.0",