Show a more useful error in older python versions

2021-09-02 03:52:08 +05:30 · 2021-09-02 03:52:08 +05:30 · 347182a0cd
commit 347182a0cd
--- a/yt_dlp/init.py
+++ b/yt_dlp/init.py
@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 # coding: utf-8

-from __future__ import unicode_literals
+f'You are using an unsupported version of Python. Only Python versions 3.6 and above are supported by yt-dlp'  # noqa: F541

 __license__ = 'Public Domain'