Bump opn-cli from 3.1.0 to 4.0.0

Bumps [opn-cli](https://github.com/sindresorhus/opn-cli) from 3.1.0 to 4.0.0.
- [Release notes](https://github.com/sindresorhus/opn-cli/releases)
- [Commits](sindresorhus/open-cli@v3.1.0...v4.0.0)

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

Author: dependabot-support

package-lock.json

@@ -118,7 +118,7 @@
 		"execa": "^1.0.0",
 		"jsdoc": "^3.5.5",
 		"nyc": "^13.0.1",
-		"opn-cli": "^3.1.0",
+		"opn-cli": "^4.0.0",
 		"rimraf": "^2.6.2",
 		"tap-nyan": "^1.1.0"
 	}