Added field can_invite_users to the promoteChatMember method

Author: pengrad

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

@@ -29,6 +29,10 @@ public PromoteChatMember canDeleteMessages(boolean canDeleteMessages) {
         return add("can_delete_messages", canDeleteMessages);
     }
 
+    public PromoteChatMember canInviteUsers(boolean canInviteUsers) {
+        return add("can_invite_users", canInviteUsers);
+    }
+
     public PromoteChatMember canRestrictMembers(boolean canRestrictMembers) {
         return add("can_restrict_members", canRestrictMembers);
     }

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

@@ -148,6 +148,7 @@ public void promoteChatMember() {
                         .canPostMessages(false)
                         .canEditMessages(false)
                         .canDeleteMessages(false)
+                        .canInviteUsers(false)
                         .canRestrictMembers(false)
                         .canPinMessages(false)
                         .canPromoteMembers(false));