Dependency alias

[Tishka17]

Sometimes (especially when we follow interface segregation principle) we have single implementation for multiple dependencies. It would be useful to have single instance for all of them.

Let's
Current way to make alias:

class MyProvider(Provider):
    @provide(scope=MyScope.REQUEST)
    def get_repo(self, repo: UserRepositoryImpl) -> UserGetter:
       return repo

We can rely on the fact that scope must be the same, so this can be simplified to:

class MyProvider(Provider):
    repo = alias(UserRepositoryImpl, dependency=UserGetter)