[NEW] devel/py-semantic_version: Python library provides
a few tools to handle SemVer in Python

This small python library provides a few tools to handle
SemVer in Python. It follows strictly the 2.0.0 version
of the SemVer scheme.

WWW: https://github.com/rbarrois/python-semanticversion

Approved by: koobs
Differential Revision: https://reviews.freebsd.org/D3021