Bump cross-env from 6.0.3 to 7.0.0

Bumps [cross-env](https://github.com/kentcdodds/cross-env) from 6.0.3 to 7.0.0.
- [Release notes](https://github.com/kentcdodds/cross-env/releases)
- [Changelog](https://github.com/kentcdodds/cross-env/blob/master/CHANGELOG.md)
- [Commits](kentcdodds/cross-env@v6.0.3...v7.0.0)

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

package.json

@@ -35,7 +35,7 @@
     "@hapi/scooter": "^6.0.0",
     "@hapi/vision": "^6.0.0",
     "blankie": "^4.1.1",
-    "cross-env": "^6.0.3",
+    "cross-env": "^7.0.0",
     "handlebars": "^4.7.2",
     "handlebars-helper-sri": "0.0.0",
     "handlebars-partial-file": "^1.0.0",