将import path改为v2

pay/notify/notify.go

@@ -1,7 +1,7 @@
 package notify
 
 import (
-	"github.com/silenceper/wechat/pay/config"
+	"github.com/silenceper/wechat/v2/pay/config"
 )
 
 //Notify 回调

pay/notify/paid.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"sort"
 
-	"github.com/silenceper/wechat/util"
+	"github.com/silenceper/wechat/v2/util"
 )
 
 // Base 公用参数