feat: accept vue cli v5 alpha as peer dependency

Author: haoqunjiang

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vue/eslint-config-airbnb",
-  "version": "5.1.0",
+  "version": "5.2.0",
   "description": "eslint-config-airbnb for Vue CLI",
   "main": "index.js",
   "publishConfig": {
@@ -30,7 +30,7 @@
     "eslint-plugin-import": "^2.21.2"
   },
   "peerDependencies": {
-    "@vue/cli-service": "^3.0.0 || ^4.0.0-0",
+    "@vue/cli-service": "^3.0.0 || ^4.0.0-0 || ^5.0.0-0",
     "eslint": "^5.16.0 || ^6.1.0 || ^7.2.0",
     "eslint-plugin-import": "^2.18.2"
   },