Upgrade to release 4.0.0:
- Drop support for Python 3.6
- Remove deprecated VERSION, use version instead
- Remove when from naturaldelta() and allow largest timedelta
- Remove deprecated private function aliases
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
