Bump cross-env from 5.2.0 to 6.0.2

Bumps [cross-env](https://github.com/kentcdodds/cross-env) from 5.2.0 to 6.0.2.
- [Release notes](https://github.com/kentcdodds/cross-env/releases)
- [Changelog](https://github.com/kentcdodds/cross-env/blob/master/CHANGELOG.md)
- [Commits](kentcdodds/cross-env@v5.2.0...v6.0.2)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -83,7 +83,7 @@
     "chai": "4.2.0",
     "chai-as-promised": "7.1.1",
     "codecov": "3.5.0",
-    "cross-env": "5.2.0",
+    "cross-env": "6.0.2",
     "cross-unzip": "0.2.1",
     "dedent-js": "1.0.1",
     "electron-devtools-installer": "2.2.4",