Merge branch 'release/3.6.0' into master

Author: rmk135

docs/main/changelog.rst

@@ -7,6 +7,12 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+3.6.0
+-----
+- Add ``CallableDelegate`` provider.
+- Add ``FactoryDelegate`` provider.
+- Add ``SingletonDelegate`` provider.
+
 3.5.0
 -----
 - Add functionality for initializing ``Configuration`` provider with default 

src/dependency_injector/__init__.py

@@ -1,6 +1,6 @@
 """Dependency injector top-level package."""
 
-__version__ = '3.5.0'
+__version__ = '3.6.0'
 """Version number that follows semantic versioning.
 
 :type: str