Bump version to 4.40.0

Author: rmk135

docs/main/changelog.rst

@@ -7,9 +7,8 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
-
-Development
------------
+4.40.0
+------
 - Add ``Configuration.from_json()`` method to load configuration from a json file.
 - Fix bug with wiring not working properly with functions double wrapped by ``@functools.wraps`` decorator.
   See issue: `#454 <https://github.com/ets-labs/python-dependency-injector/issues/454>`_.

src/dependency_injector/__init__.py

@@ -1,6 +1,6 @@
 """Top-level package."""
 
-__version__ = "4.39.1"
+__version__ = "4.40.0"
 """Version number.
 
 :type: str