Added the parameter revoke_messages to the method kickChatMember, allowing to delete all messages from a group for the user who is being removed.

Author: pengrad

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

@@ -16,4 +16,8 @@ public KickChatMember(Object chatId, int userId) {
     public KickChatMember untilDate(int untilDate) {
         return add("until_date", untilDate);
     }
+
+    public KickChatMember revokeMessages(boolean revokeMessages) {
+        return add("revoke_messages", revokeMessages);
+    }
 }

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

@@ -244,7 +244,7 @@ public void getFile() throws IOException {
 
     @Test
     public void kickChatMember() {
-        BaseResponse response = bot.execute(new KickChatMember(channelName, chatId).untilDate(123));
+        BaseResponse response = bot.execute(new KickChatMember(channelName, chatId).untilDate(123).revokeMessages(true));
         assertFalse(response.isOk());
         assertEquals(400, response.errorCode());
         assertEquals("Bad Request: can't remove chat owner", response.description());