Attempt linking in reference documentation signatures

[Zac-HD]

In Hypothesis' docs, we often have functions which show default arguments, where it seems like those values could be auto-linked. For example, st.datetimes(min_value=datetime.datetime.min, ...) could link to datetime.datetime.min. This is definitely not a priority for us, but I thought I'd mention the idea 🙂

[felix-hilden]

Thanks for the idea, I like it! I'm perpetually busy this spring but I'll get back to you 👌 Or if you want to try to have a go at it (or anyone else stumbling on this), feel free