fix(deps): update eslint-visitor-keys to v4 (#293)

Author: MichaelDeBoey

package.json

@@ -53,7 +53,7 @@
         "watch": "warun \"{src,test}/**/*.mjs\" -- npm run -s test:mocha"
     },
     "dependencies": {
-        "eslint-visitor-keys": "^3.4.3"
+        "eslint-visitor-keys": "^4.2.1"
     },
     "devDependencies": {
         "@eslint-community/eslint-plugin-mysticatea": "^15.8.0",