chore:! eslint plugins should be peerDependencies

Author: haoqunjiang

package.json

@@ -27,6 +27,7 @@
   },
   "peerDependencies": {
     "eslint": "^5.16.0 || ^6.1.0",
+    "eslint-plugin-import": "^2.18.2",
     "@vue/cli-service": "^3.0.0 || ^4.0.0-0"
   }
 }