修正this指向错误的bug

typings/index.d.ts

@@ -0,0 +1,11 @@
+declare interface AnyProxyConfig {
+  port: number
+}
+declare interface AnyProxyRule {
+  summary?: string,
+  beforeSendRequest?: Function,
+  beforeSendResponse?: Function,
+  beforeDealHttpsRequest?: Function,
+  onError?: Function,
+  onConnectError?: Function
+}