CI: enable default setuptools_scm config and remove hotfix from gh pa…

…ges workflow

CI: add installation of setuptools scm

REL : release 2.2.1

DOC : missing documentation for fit_from_interval_censored_lifetimes

REL : release 2.1.3

BUGFIX :
- IC computation, error in np.einsum
- issue 40 and 41 on rvs

UPGRADE/BUGFIX : 2.1.2 release

Some bugfix (import error and remove old ar1 in AgeReplacementPolicy)
and cleaning a bit the pyproject.toml

FIX : NHPP optimize was not working with NHPP from LifetimeDistributi…

…on due to freeze conflict

doc

changes before release

fix errors in gh-pages config file