添加通用封面规则

app/src/main/assets/defaultData/coverRuleConfig.json

@@ -1,4 +1,5 @@
 {
+  "enable": true,
   "searchUrl": "https://api.yousuu.com/api/search?type=title&value={{key}}&page=1&highlight=0&from=search",
   "coverRule": "@js:java.getString(\"$..books[?(@.author == '\" + book.author + \"')].cover\")"
 }