Release v4.0.0.

Author: kdeldycke

changelog.rst

@@ -1,11 +1,9 @@
 Changelog
 =========
 
-`4.0.0 (unreleased) <https://github.com/kdeldycke/meta-package-manager/compare/v3.6.0...develop>`_
+`4.0.0 (2021-04-27) <https://github.com/kdeldycke/meta-package-manager/compare/v3.6.0...v4.0.0>`_
 -------------------------------------------------------------------------------------------------
 
-.. note:: This version is not yet released and is under active development.
-
 * [xbar] Ugrade BitBar plugin to new xbar format.
 * [xbar] Drop xbar plugin requirement on Python 2.x and bump it up to Python 3.7.3.
 * [xbar] Update references of BitBar to xbar.