upgrade ajv 8.0.0

Author: epoberezkin

package.json

@@ -35,15 +35,15 @@
   },
   "homepage": "https://github.com/ajv-validator/ajv-formats#readme",
   "peerDependencies": {
-    "ajv": "^8.0.0-beta.4"
+    "ajv": "^8.0.0"
   },
   "devDependencies": {
     "@ajv-validator/config": "^0.3.0",
     "@types/jest": "^26.0.5",
     "@types/node": "^14.10.1",
     "@typescript-eslint/eslint-plugin": "^3.7.0",
     "@typescript-eslint/parser": "^3.7.0",
-    "ajv": "^8.0.0-beta.4",
+    "ajv": "^8.0.0",
     "eslint": "^7.5.0",
     "eslint-config-prettier": "^6.11.0",
     "husky": "^4.2.5",