Use setuptools instead of distutils. (no)

setup.py

@@ -1,11 +1,10 @@
 #!/usr/bin/env python3
 
 import sys
-from distutils.core import setup
 from warnings import warn
 
 from pip.req import parse_requirements
-from setuptools import PackageFinder
+from setuptools import PackageFinder, setup
 
 from aiogram import Stage, VERSION
 
@@ -47,6 +46,7 @@ setup(
     name='aiogram',
     version=VERSION.version,
     packages=PackageFinder.find(exclude=('tests', 'tests.*', 'examples.*', 'docs',)),
+    requires_python='>=3.6',
     url='https://github.com/aiogram/aiogram',
     license='MIT',
     author='Alex Root Junior',