Log Message:
py-relativetimebuilder: updated to 3.0.0

relativetimebuilder 3.0.0

Changes

Add support for concise interval format (e.g. "2007-12-14T13:30/15:30")
Implement range checks supported by aniso8601 9.0.0
Add version to version.py
Cleaner reading of README.rst into the long_description field of setup.py
Define long_description_content_type as text/x-rst
Simplify Sphinx configuration
Bump copyright date to 2021

Deprecation

Deprecate running tests with python setup.py tests as the test suite support in \ 
Setuptools is deprecated