Remove a deprecation warning when computing the package version.
Review Request #11264 — Created Nov. 4, 2020 and submitted
In pretty much all of our Python packages, we generate a package version
using legacy identifiers of "alpha" and "beta". These get turned into
"a" and "b" by
pkg_resources, and a warning is thrown to inform us
that we're doing it wrong.
To reduce those warnings, this change converts the legacy naming to
modern naming when generating the package version.
Built packages. Saw the correct identifier in the package file, without
seeing any warnings.