[feature] Format the code and improve Mini Program authorization to o… (#473)

* [feature] Format the code and improve Mini Program authorization to obtain openid（miniprogram/auth/auth.go Code2Session）

* [feature] CheckEncryptedData (https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/user-info/auth.checkEncryptedData.html)

* upgrade json error

* upgrade json error

Co-authored-by: houseme <houseme@outlook.com>

openplatform/openplatform.go

@@ -11,12 +11,12 @@ import (
 	"github.com/silenceper/wechat/v2/openplatform/officialaccount"
 )
 
-//OpenPlatform 微信开放平台相关api
+// OpenPlatform 微信开放平台相关api
 type OpenPlatform struct {
 	*context.Context
 }
 
-//NewOpenPlatform new openplatform
+// NewOpenPlatform new openplatform
 func NewOpenPlatform(cfg *config.Config) *OpenPlatform {
 	if cfg.Cache == nil {
 		panic("cache 未设置")
@@ -27,24 +27,24 @@ func NewOpenPlatform(cfg *config.Config) *OpenPlatform {
 	return &OpenPlatform{ctx}
 }
 
-//GetServer get server
+// GetServer get server
 func (openPlatform *OpenPlatform) GetServer(req *http.Request, writer http.ResponseWriter) *server.Server {
 	off := officialaccount.NewOfficialAccount(openPlatform.Context, "")
 	return off.GetServer(req, writer)
 }
 
-//GetOfficialAccount 公众号代处理
+// GetOfficialAccount 公众号代处理
 func (openPlatform *OpenPlatform) GetOfficialAccount(appID string) *officialaccount.OfficialAccount {
 	return officialaccount.NewOfficialAccount(openPlatform.Context, appID)
 }
 
-//GetMiniProgram 小程序代理
+// GetMiniProgram 小程序代理
 func (openPlatform *OpenPlatform) GetMiniProgram(appID string) *miniprogram.MiniProgram {
 	return miniprogram.NewMiniProgram(openPlatform.Context, appID)
 }
 
-//GetAccountManager 账号管理
-//TODO
+// GetAccountManager 账号管理
+// TODO
 func (openPlatform *OpenPlatform) GetAccountManager() *account.Account {
 	return account.NewAccount(openPlatform.Context)
 }