Update filter methods to 4.x

[RedactedCode]

While the current filter methods in Mastodon.py should be treated as deprecated, they do still work after a fashion (it is possible to at create a filter on a per-keyword basis, which then gets created with a title the same as the keyword.)

However it would be really good to have a set of methods that are fully compatible with the v4.x version of Mastodon filters.

(I know you know this, but I thought I'd park it here as a formal request)

[halcy]

Thanks - ideally I’d actually have an issue for every missing or changed endpoint to track them, I’m just too lazy to create those

the thing that was keeping me busy has wrapped up now, so I will get back to mastopy dev soon, but I need a week or two to recover, I think

[RedactedCode]

Oh for sure, I follow you on Mastodon so I know how busy you've been. have a good chill.