修复喜欢音乐接口参数判断问题 #453,增加歌单收藏者列表接口#452,更新文档

module/playlist_subscribers.js

@@ -0,0 +1,13 @@
+module.exports = (query, request) => {
+  const data = {
+    id: query.id,
+    limit: query.limit || 20,
+    offset: query.offset || 0
+  };
+  return request(
+    "POST",
+    `https://music.163.com/weapi/playlist/subscribers`,
+    data,
+    { crypto: "weapi", cookie: query.cookie, proxy: query.proxy }
+  );
+};