更新版本到 1.8.7

ChangeLog
1、修复订阅失败后无法重新订阅的问题
2、添加订阅失败后SDK尝试自动重试的逻辑

lib/index.d.ts

@@ -298,7 +298,7 @@ declare module '__urtc-sdk/resolutions' {
 }
 
 declare module '__urtc-sdk/version' {
-  export const version = "1.8.6";
+  export const version = "1.8.7";
 }
 
 declare module '__urtc-sdk/token' {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "urtc-sdk",
-  "version": "1.8.6",
+  "version": "1.8.7",
   "description": "UCloud RTC javascript SDK",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",