Public APIs should raise an exception when passed unexpected arguments

[evilham]

As @glyph mentioned, this is a breaking change, so it has to be done in multiple steps as per https://twisted.readthedocs.io/en/twisted-19.7.0/core/development/policy/compatibility-policy.html

• [x] Check passed arguments and raise a warning if they are unexpected (#251).
• [ ] Release
• [ ] Modify method signatures so that an exception is raised