修复：兼容旧版本保存的telegram配置

app/src/main/java/com/idormy/sms/forwarder/model/vo/TelegramSettingVo.java

@@ -1,5 +1,7 @@
 package com.idormy.sms.forwarder.model.vo;
 
+import android.text.TextUtils;
+
 import com.idormy.sms.forwarder.R;
 
 import java.io.Serializable;
@@ -44,7 +46,7 @@ public class TelegramSettingVo implements Serializable {
         this.proxyAuthenticator = proxyAuthenticator;
         this.proxyUsername = proxyUsername;
         this.proxyPassword = proxyPassword;
-        this.method = method;
+        this.method = TextUtils.isEmpty(method) ? "POST" : method;
     }
 
     public int getProxyTypeCheckId() {

app/src/main/java/com/idormy/sms/forwarder/sender/SenderTelegramMsg.java

@@ -88,7 +88,7 @@ public class SenderTelegramMsg extends SenderBaseMsg {
                 .build();
 
         final Request request;
-        if (method.equals("GET")) {
+        if (method != null && method.equals("GET")) {
             request = new Request.Builder()
                     .url(requestUrl + "?chat_id=" + chatId + "&text=" + URLEncoder.encode(finalText, "UTF-8"))
                     .build();