chore(deps-dev): bump execa from 5.1.1 to 6.1.0

Bumps [execa](https://github.com/sindresorhus/execa) from 5.1.1 to 6.1.0.
- [Release notes](https://github.com/sindresorhus/execa/releases)
- [Commits](sindresorhus/execa@v5.1.1...v6.1.0)

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

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

package.json

@@ -51,7 +51,7 @@
     "eslint": "^7.5.0",
     "eslint-plugin-import": "^2.20.2",
     "eslint-plugin-vue": "^7.1.0",
-    "execa": "^5.1.1",
+    "execa": "^6.1.0",
     "less": "^4.1.1",
     "less-loader": "^10.0.0",
     "minimist": "^1.2.5",