* Fixed Python 3.5.3 compatibility
* Added remaining type hints to the codebase so that the client code can
have better static typing safety
* Fixed UnsatisfiedRequirement string representation (this time for real)
* Added forward return type reference support to provider methods
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-injector?expand=0&rev=11