Correct type annotations in patch.dict()

[plannigan]

The documentation for patch.dict() says:

in_dict can be a dictionary or a mapping like container. If it is a mapping then it must at least support getting, setting and deleting items plus iterating over keys.
in_dict can also be a string specifying the name of the dictionary, which will then be fetched by importing it.

However, the argument is currently annotation is Mapping[Any, Any]. This updates the annotation to also include the string option.

[plannigan]

It looks like the CI failures are not related to my changes.

• setuptools_scm recently released v6.0, which dropped support for python 3.5
• The linting stage is setup to use python 3.7, but tox is trying to use python 3.6.

[nicoddemus]

Thanks, looks good!

Could you also add a CHANGELOG entry?

[plannigan]

Sure, updated now.

[nicoddemus]

Thanks a lot!