Bump cross-env from 5.1.0 to 5.1.4

Bumps [cross-env](https://github.com/kentcdodds/cross-env) from 5.1.0 to 5.1.4.
- [Release notes](https://github.com/kentcdodds/cross-env/releases)
- [Changelog](https://github.com/kentcdodds/cross-env/blob/master/CHANGELOG.md)
- [Commits](kentcdodds/cross-env@v5.1.0...v5.1.4)

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

Author: dependabot-support

yarn.lock

@@ -1688,8 +1688,8 @@ create-hmac@^1.1.0, create-hmac@^1.1.2, create-hmac@^1.1.4:
     sha.js "^2.4.8"
 
 cross-env@^5.1.0:
-  version "5.1.0"
-  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-5.1.0.tgz#1f12d6b3777d5847dcf9cf39fbee3c6a76dd5058"
+  version "5.1.4"
+  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-5.1.4.tgz#f61c14291f7cc653bb86457002ea80a04699d022"
   dependencies:
     cross-spawn "^5.1.0"
     is-windows "^1.0.0"