Improve MockerCore type stubs
Improve MockerCore type stubs

For #171

Modifications to `MockerCore`:
- Adds the missing `url` parameter to the `register_uri` and `request` methods.
- Renames the `path` parameters of `delete`, `get`, `head`, `options`, `patch`, `post`, and `put` methods to `url` to match the name of the corresponding parameter in `requests_mock.adapter.Adapter.register_uri`.
- Changes the types of various `method` and `url` parameters to support the `requests_mock.adapter.ANY` "wildcard" value.

jamielennox/requests-mock