upgrade version 2.0,add login api,upgrade api verison,add document and unit test

test/lyric.test.js

@@ -0,0 +1,20 @@
+const assert = require('assert')
+const crypto = require('crypto')
+const { createRequest } = require("../util/util")
+const phone = "换成你的账号"
+const password = "换成你的密码"
+
+describe('测试获取歌词是否正常', () => {
+  it('数据应该有 lrc 字段', done => {
+    const id = 347230
+    createRequest('/api/song/lyric?os=osx&id=' + id + '&lv=-1&kv=-1&tv=-1', 'GET', null)
+      .then(result => {
+        console.log(JSON.parse(result).lrc)
+        assert(typeof JSON.parse(result).lrc!=='undefined')
+        done()
+      })
+      .catch(err => {
+        done(err)
+      })
+  })
+})