Bump lint-staged from 9.3.0 to 9.4.0

Bumps [lint-staged](https://github.com/okonet/lint-staged) from 9.3.0 to 9.4.0.
- [Release notes](https://github.com/okonet/lint-staged/releases)
- [Commits](lint-staged/lint-staged@v9.3.0...v9.4.0)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -35,7 +35,7 @@
     "eslint-config-prettier": "^6.0.0",
     "eslint-plugin-prettier": "^3.1.0",
     "coveralls": "^3.0.5",
-    "lint-staged": "~9.3.0",
+    "lint-staged": "~9.4.0",
     "jest": "^24.8.0",
     "husky": "~3.0.1"
   },