Update darling, quote, proc-macro2, syn

[spearman]

There were some changes in how syn handles paths/idents. I haven't actually written any procedural macros myself so somebody may want to look it over, but all tests were passed.

[TedDriggs]

Thanks for submitting this. Due to the increase in darling's strsim dependency, I'm going to need to make this be a minor version bump to maintain compatibility.

[kpcyrd]

I'm very interested in this patch too, is there any way I can help getting this landed?

[TedDriggs]

I'll take a look Monday and get the version bump done

[azriel91]

@TedDriggs derive-builder-core was published, but the derive-builder crate itself hasn't. Wondering if that was a partial publishing error or something? 🙃

(am super keen to bump deps)

edit: ah yeap -- publishing needs a delay: #146

[TedDriggs]

@azriel91 sorry about that. I don't have my computer with me now, but it'll be live by 8am Pacific tomorrow

[TedDriggs]

@azriel91 it's now fixed. If you submit a PR adding a 10-second sleep between publishes, I'll happily merge it. (10s is arbitrary, but seemed to be enough for darling's script to start working again)