Update dependency execa to v5 (#66)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package-lock.json

@@ -34,7 +34,7 @@
 	"dependencies": {
 		"chalk": "^4.0.0",
 		"commander": "^4.1.1",
-		"execa": "^4.0.0",
+		"execa": "^5.0.0",
 		"ignore": "^5.1.4",
 		"microloader": "^0.4.2",
 		"parse-git-status": "^0.1.0"