Bump version to 4.0.3

docs/main/changelog.rst

@@ -7,8 +7,8 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
-Development version
--------------------
+4.0.3
+-----
 - Deprecate ``@containers.override()`` and ``@containers.copy()`` decorators.
 - Update changelog of version ``4.0.0`` so it lists all deprecated features.
 

src/dependency_injector/__init__.py

@@ -1,6 +1,6 @@
 """Top-level package."""
 
-__version__ = '4.0.2'
+__version__ = '4.0.3'
 """Version number.
 
 :type: str