4.3.0

Features:

• Add Python 3.8 support (#956). Thanks @hramezani
• Unpin commented out unsafe packages in requirements.txt (#975). Thanks @atugushev

Bug Fixes:

• Fix pip-compile doesn't copy --trusted-host from requirements.in to requirements.txt (#964). Thanks @atugushev
• Add compatibility with pip>=20.0 (#953 and #978). Thanks @atugushev
• Fix a bug where the resolver wouldn't clean up the ephemeral wheel cache (#968). Thanks @atugushev

Improved Documentation:

• Add a note to README about requirements.txt file, which would possibly interfere if you're compiling from scratch (#959). Thanks @hramezani