chore!: drop ESLint 7 support

Just to be in sync with eslint-plugin-prettier's requirements.
https://github.com/prettier/eslint-plugin-prettier/pull/508/files#r1262883437

Author: haoqunjiang

package.json

@@ -35,7 +35,7 @@
     "prettier": "^3.0.0"
   },
   "peerDependencies": {
-    "eslint": ">= 7.28.0",
+    "eslint": ">= 8.0.0",
     "prettier": ">= 3.0.0"
   },
   "eslintConfig": {