chore(deps-dev): bump cpx2 from 3.0.2 to 4.0.0

Bumps [cpx2](https://github.com/bcomnes/cpx2) from 3.0.2 to 4.0.0.
- [Release notes](https://github.com/bcomnes/cpx2/releases)
- [Changelog](https://github.com/bcomnes/cpx2/blob/master/CHANGELOG.md)
- [Commits](https://github.com/bcomnes/cpx2/compare/v3.0.2...v4.0.0)

---
updated-dependencies:
- dependency-name: cpx2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -17,7 +17,7 @@
     "auto-changelog": "^2.0.0",
     "@zeit/ncc": "^0.22.0",
     "budo": "^11.6.3",
-    "cpx2": "^3.0.0",
+    "cpx2": "^4.0.0",
     "dependency-check": "^4.1.0",
     "gh-release": "^6.0.0",
     "npm-run-all": "^4.1.5",