Increase version to 3.8.1

docs/main/changelog.rst

@@ -7,6 +7,10 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+3.8.1
+-----
+- Fix padding problem in code samples in docs.
+
 3.8.0
 -----
 - Add ``DeclarativeContainer.containers`` attribute that stores dictionary of

src/dependency_injector/__init__.py

@@ -1,6 +1,6 @@
 """Dependency injector top-level package."""
 
-__version__ = '3.8.0'
+__version__ = '3.8.1'
 """Version number that follows semantic versioning.
 
 :type: str