fix(deps): update dependency read-pkg-up to v8

Author: renovate[bot]

packages/eslint-config/package.json

@@ -80,7 +80,7 @@
         "find-up": "5.0.0",
         "lodash.has": "^4.5.2",
         "object.assign": "^4.1.4",
-        "read-pkg-up": "7.0.1",
+        "read-pkg-up": "8.0.0",
         "semver": "^7.3.8"
     },
     "devDependencies": {