Add max_connections in SetWebhook

Author: pengrad

src/main/java/com/pengrad/telegrambot/request/SetWebhook.java

@@ -30,6 +30,10 @@ public SetWebhook certificate(File certificate) {
         return add("certificate", certificate);
     }
 
+    public SetWebhook maxConnections(int maxConnections) {
+        return add("max_connections", maxConnections);
+    }
+
     @Override
     public boolean isMultipart() {
         return isMultipart;

src/test/java/com/pengrad/telegrambot/TelegramBotTest.java

@@ -14,6 +14,8 @@
 import java.util.List;
 import java.util.Properties;
 
+import static org.junit.Assert.assertTrue;
+
 /**
  * stas
  * 5/2/16.
@@ -231,6 +233,12 @@ public void getWebhookInfo() {
         WebhookInfoTest.check(response.webhookInfo());
     }
 
+    @Test
+    public void setWebhook() {
+        BaseResponse response = bot.execute(new SetWebhook().url("https://google.com").maxConnections(100));
+        assertTrue(response.isOk());
+    }
+
     @Test
     public void sendGame() {
         SendResponse response = bot.execute(new SendGame(chatId, "pengrad_test_game"));