Bump version to '2.4.0'.

AUTHORS

 This file maintains the list of present and past declearn authors.
 A secondary file listing punctual open-source contributors may complement it.
 
+Declearn 2.4
+- Paul Andrey
+
 Declearn 2.1 - 2.3
 - Paul Andrey
 - Nathan Bigaud

declearn/version.py

@@ -17,5 +17,5 @@
 
 """DecLearn version information, as hard-coded constants."""
 
-VERSION = "2.4.0b"
+VERSION = "2.4.0"
 """Version information of the installed DecLearn package."""

pyproject.toml

@@ -8,7 +8,7 @@ requires = [
 
 [project]
 name = "declearn"
-version = "2.3.1"
+version = "2.4.0"
 description = "Declearn - a python package for private decentralized learning."
 readme = "README.md"
 requires-python = ">=3.8"