deps: bump execa from 6.1.0 to 7.0.0

Bumps [execa](https://github.com/sindresorhus/execa) from 6.1.0 to 7.0.0.
- [Release notes](https://github.com/sindresorhus/execa/releases)
- [Commits](sindresorhus/execa@v6.1.0...v7.0.0)

---
updated-dependencies:
- dependency-name: execa
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -262,7 +262,7 @@
  "eslint-plugin-jsdoc": "^39.6.4",
  "eslint-plugin-node": "^11.1.0",
  "eslint-plugin-promise": "^6.1.1",
- "execa": "^6.1.0",
+ "execa": "^7.0.0",
  "extract-zip": "^2.0.1",
  "fs-extra": "^11.1.0",
  "gh-pages": "^4.0.0",