Added field mask_position to the addStickerToSet method #120

.gitignore

@@ -2,6 +2,7 @@
 *.iml
 .gradle
 build
+out
 
 .DS_Store
 local.properties

library/src/main/java/com/pengrad/telegrambot/request/AddStickerToSet.java

@@ -1,5 +1,6 @@
 package com.pengrad.telegrambot.request;
 
+import com.pengrad.telegrambot.model.MaskPosition;
 import com.pengrad.telegrambot.response.BaseResponse;
 
 /**
@@ -14,4 +15,8 @@ public AddStickerToSet(Integer userId, String name, Object pngSticker, String em
         add("name", name);
         add("emojis", emojis);
     }
+
+    public AddStickerToSet maskPosition(MaskPosition maskPosition) {
+        return add("mask_position", serialize(maskPosition));
+    }
 }

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

@@ -908,7 +908,8 @@ public void createNewStickerSet() throws IOException {
     @Test
     public void addStickerToSet() {
         BaseResponse response = bot.execute(
-                new AddStickerToSet(chatId, stickerSet, "BQADAgADuAAD7yupS4eB23UmZhGuAg", "\uD83D\uDE15"));
+                new AddStickerToSet(chatId, stickerSet, "BQADAgADuAAD7yupS4eB23UmZhGuAg", "\uD83D\uDE15")
+                        .maskPosition(new MaskPosition("eyes", 0f, 0f, 1f)));
         assertTrue(response.isOk());
     }