Update dependency eslint-visitor-keys to v3 (#57)

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

Author: renovate[bot]

package.json

@@ -37,7 +37,7 @@
     "homepage": "https://github.com/ota-meshi/svelte-eslint-parser#readme",
     "dependencies": {
         "eslint-scope": "^5.1.1",
-        "eslint-visitor-keys": "^2.0.0",
+        "eslint-visitor-keys": "^3.0.0",
         "espree": "^7.3.1"
     },
     "peerDependencies": {