In setuptools 2712 setuptools learned to natively
support globbing data files, and the pbr setting to do the exact same thing is
not needed anymore. Pin the minimum build requirement to ensure the correct
version is used.

There is no need to ship both .po and .mo files.

setuptools_scm is a standard and robust tool for dynamically getting
version numbers from e.g. git; among its features is the ability to
write the results to a python module that the application can then
import from. This removes the overhead of large modules which introspect
the dist-info to get the version, in favor of importing a frozen string.