Use semantic versioning starting with version 0.50.0
To allow softwares built on top of Duniterpy to not break on upgrade, we need to use semantic versioning.
We will start at 0.50.0 version.
Then softwares will use this syntax in requirements.txt
file to not break compatibility:
duniterpy>=0.43.0,<0.50.0
See : https://www.python.org/dev/peps/pep-0440/#version-specifiers