Bump cross-env from 7.0.2 to 7.0.3

Bumps [cross-env](https://github.com/kentcdodds/cross-env) from 7.0.2 to 7.0.3.
- [Release notes](https://github.com/kentcdodds/cross-env/releases)
- [Changelog](https://github.com/kentcdodds/cross-env/blob/master/CHANGELOG.md)
- [Commits](kentcdodds/cross-env@v7.0.2...v7.0.3)

---
updated-dependencies:
- dependency-name: cross-env
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -31,7 +31,7 @@
     "babel-loader": "^8.1.0",
     "clean-webpack-plugin": "^3.0.0",
     "copy-webpack-plugin": "^6.4.1",
-    "cross-env": "^7.0.2",
+    "cross-env": "^7.0.3",
     "css-loader": "^5.0.1",
     "eslint": "^7.14.0",
     "eslint-plugin-import": "^2.22.1",