Finish the remaining migration of shebang to python3.
MODIFY
tools/deploy
tools/deploy
-#!/usr/bin/env python
+#!/usr/bin/env python3
from typing import Any, List, Dict, Callable

MODIFY
tools/lint
tools/lint
-#! /usr/bin/env python
+#! /usr/bin/env python3
from __future__ import print_function
from __future__ import absolute_import

MODIFY
tools/review
tools/review
-#!/usr/bin/env python
+#!/usr/bin/env python3
from __future__ import print_function
import subprocess

MODIFY
tools/run-mypy
tools/run-mypy
-#!/usr/bin/env python
+#!/usr/bin/env python3
from __future__ import absolute_import
from __future__ import print_function

MODIFY
tools/test-botserver
tools/test-botserver
-#!/usr/bin/env python
+#!/usr/bin/env python3
from server_lib.test_handler import handle_input_and_run_tests_for_package

MODIFY
tools/test-lib
tools/test-lib
-#!/usr/bin/env python
+#!/usr/bin/env python3
from server_lib.test_handler import handle_input_and_run_tests_for_package

MODIFY
tools/test-zulip
tools/test-zulip
-#!/usr/bin/env python
+#!/usr/bin/env python3
from server_lib.test_handler import handle_input_and_run_tests_for_package

MODIFY
zulip/setup.py
zulip/setup.py
-#!/usr/bin/env python
+#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from __future__ import print_function

MODIFY
zulip/zulip/api_examples.py
zulip/zulip/api_examples.py
-#!/usr/bin/env python
+#!/usr/bin/env python3
import os
import zulip

MODIFY
zulip/zulip/send.py
zulip/zulip/send.py
-#!/usr/bin/env python
+#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# zulip-send -- Sends a message to the specified recipients.

MODIFY
zulip_botserver/setup.py
zulip_botserver/setup.py
-#!/usr/bin/env python
+#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from __future__ import print_function

Finish the remaining migration of shebang to python3.