Rebuild manylinux2014, to update mirrorlist URL
manylinux2014 builds were getting the following error
Could not resolve host: mirrorlist.centos.org
The manylinux2014 base image was recently updated to use a new URL. See: pypa/manylinux@7beb9ae
Do a new release, which will rebuild docker images and pick up the new URLs.
Full Changelog: v0.9.59...v0.9.60