Bump version to 2.3.0 and update authors info.

AUTHORS

 This file maintains the list of present and past declearn authors.
 A secondary file listing punctual open-source contributors may complement it.
 
-Declearn 2.1
+Declearn 2.1 - 2.3
 - Paul Andrey
 - Nathan Bigaud
 

declearn/__init__.py

@@ -65,4 +65,4 @@ from . import (
     utils,
 )
 
-__version__ = "2.2.0"
+__version__ = "2.3.0"

pyproject.toml

@@ -8,7 +8,7 @@ requires = [
 
 [project]
 name = "declearn"
-version = "2.2.0"
+version = "2.3.0"
 description = "Declearn - a python package for private decentralized learning."
 readme = "README.md"
 requires-python = ">=3.8"
@@ -19,7 +19,6 @@ authors = [
 ]
 maintainers = [
     {name = "Paul Andrey", email = "paul.andrey@inria.fr"},
-    {name = "Nathan Bigaud", email = "nathan.bigaud@inria.fr"},
 ]
 classifiers = [
     "Development Status :: 5 - Production/Stable",