* Testing PyPy 7.3.1rc1/7.3.1rc2
* Try PyPy's fix for macOS
* 7.3.1rc3
* Update PyPy to 7.3.1
* Using latest pypywheels/manylinux2010-pypy_x86_64:2020-04-15-4ce2a6f with PyPy 7.3.1
* Rehost pypy-7.3.1 on Github to guard against bitbucket links going away
The pypy team plan to have a CDN in front of their buildbot downloads
page, but the timeline is unknown. In the meantime, this should be more
reliable than the bitbucket links!
* Updating macOS and Windows download links for PyPy to https://downloads.python.org/pypy/
Co-authored-by: Joe Rickerby <joerick@mac.com>