Fix building chrono-fuzz

[LingMan]

• Fixes building chrono-fuzz which was broken in Add parse_from_xxx to DateTime<Utc> #806
• (Sneaks in a minor Dependabot nit that doesn't deserve its own CI run)

[djc]

I'd like to have most of these changes (except the first one, which I think wouldn't commit) on 0.4.x (from where we'll merge them to main), would you be able to retarget the PR (and rebase the changes)?

[LingMan]

Sure, give me a bit to figure it out.

[djc]

I recommend git rebase -i main, then killing all except the last three non-commented lines.

[LingMan]

Actually, neither the first nor the last commit make sense on 0.4.x and considering chrono-fuzz hasn't been touched in 3 years adding it to CI in a stable branch now doesn't seem fruitful either. I can make a separate PR for that if you really want though.

[djc]

Since most development currently happens on 0.4.x, I would still appreciate such a PR for all the applicable changes.

[LingMan]

Here you go: #968.
I've dropped those commits from this PR so it now mostly fixes the chrono-fuzz build.

[jtmoon79]

LGTM

Also see fuzzing-related Issues in Bug #1010 , PR #603 .

[djc]

Thanks!