Updating supported python versions in the setup.py file

AUTHORS.txt

@@ -17,17 +17,21 @@ Edd Barrett https://github.com/vext01
 Eugene Yang https://github.com/eugene-yang
 Felix Yan https://github.com/felixonmars
 fthoma https://github.com/fthoma
+Greg Witt https://github.com/GoodGuyGregory
 hinlader https://github.com/hinlader
 Hugo https://github.com/hugovk
 Hynek Cernoch https://github.com/hynekcer
 Jason R. Coombs https://github.com/jaraco
 Jon Crall https://github.com/Erotemic
 Jonathan Slenders https://github.com/jonathanslenders
+JustAShoeMaker https://github.com/JustAShoeMaker
 Marcelo Glezer https://github.com/gato
 Maximilian Hils https://github.com/mhils
+Michał Górny https://github.com/mgorny
 Nikolaos-Digenis Karagiannis https://github.com/Digenis
 Nils Ohlmeier https://github.com/nils-ohlmeier
 Orson Peters https://github.com/orlp
+pgajdos https://github.com/pgajdos
 Six https://github.com/brbsix
 Stefan Devai https://github.com/stefandevai
 Stefan Scherfke https://github.com/sscherfke

README.md

@@ -1,6 +1,8 @@
 Pyperclip is a cross-platform Python module for copy and paste clipboard functions. It works with Python 2 and 3.
 
-`pip install pyperclip`
+Install on Windows: `pip install pyperclip`
+
+Install on Linux/macOS: `pip3 install pyperclip`
 
 Al Sweigart [email protected]
 BSD License

setup.py

@@ -43,5 +43,7 @@
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
     ],
-)
+)