新增版本检查功能 v2.20.0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "NeteaseCloudMusicApi",
-  "version": "2.19.0",
+  "version": "2.20.0",
   "description": "网易云音乐 NodeJS 版 API",
   "scripts": {
     "start": "node app.js",
@@ -18,7 +18,8 @@
     "apicache": "^1.2.1",
     "big-integer": "^1.6.28",
     "express": "^4.16.3",
-    "request": "^2.85.0"
+    "request": "^2.85.0",
+    "npmview": "^0.0.4"
   },
   "devDependencies": {
     "intelli-espower-loader": "^1.0.1",