Make Options (De)serialisable with serde

[byhemechi]

I've added basic serde attributes to the Config struct and its dependencies, only within the serde feature.

Please have a brief check that i've not missed any renames so that we stay in sync with micromark

Feel free to be rude if i've done anything stupid

All existing tests pass though I haven't written any new ones yet

[byhemechi]

please don't merge this yet, i'm yet to set up the defaults properly

it should be good now, dont merge without checking though of course

[byhemechi]

The check fail is on a file outside the scope of this PR so i'm not going to fix it here

[wooorm]

yeah don’t worry about that, that was my commit just now, will fix soon!

[wooorm]

Thanks! Code looks good, I do wonder if there should be some tests? And, should be documented in the features docs: https://docs.rs/markdown/1.0.0-alpha.9/markdown/#features

[byhemechi]

I've adjusted the docs, will work on tests very soon. Are you ok with pulling in serde_json as a dev dependency for said tests?

[wooorm]

Sure!

[byhemechi]

Alright, doing tests now. To be entirely honest i don't know if these test actually achieve anything as all they are really doing is testing serde behaviour, which is already in their tests and is obviously covered by semver

[wooorm]

I guess you can check if it works, and that there is a specific string being generated?

[byhemechi]

yeah, that's what i'm ending up doing :)

testing deserialisation is mildly annoying though because nothing is Eq

[wooorm]

last I remember you were still working on this, right? Or is it done?

[byhemechi]

Sorry, got busy with life and didn't quite finish it :)

I've written some of the tests but once again they aren't really needed for coverage, serde has tests on the macros and the structs themselves already have tests