Moved 'envs' functionality to its own package, jaraco.envs.
2.0
===
Switch to `pkgutil namespace technique <https://packaging.python.org/guides/packaging-namespace-packages/#pkgutil-style-namespace-packages>`_ for the ``jaraco`` namespace.
1.9
===
Refresh package metadata, including use of declarative config.
Replace deprecated ``jaraco.timing`` dependency with ``tempora``.