builds.sr.ht: fix use of $subpkgdir

builds.sr.ht: add -api

py3-humanize: upgrade to 3.5.0

py3-sshpubkeys: upgrade to 3.3.1

This should allow for FIDO/U2F ssh keys of various types.

Also, it seems there was a typo in the dependencies referencing
py3-crypto when py3-cryptography is what is needed[1].

[1]: https://github.com/ojarva/python-sshpubkeys/blob/c81fbf0668c58a7d5518772127b0ad2aeda79076/setup.py#L36

py3-weasyprint: upgrade to 52.5

py3-pgpy: upgrade to 0.5.4

py3-humanize: upgrade to 3.4.1

meta.sr.ht: upgrade to 0.53.16

meta.sr.ht: drop py3-pystache

todo.sr.ht: upgrade to 0.64.13

paste.sr.ht: upgrade to 0.12.1

pages.sr.ht: upgrade to 0.4.4

meta.sr.ht: upgrade to 0.53.15

man.sr.ht: upgrade to 0.15.12

lists.sr.ht: upgrade to 0.48.19

legacy.sr.ht-shim: bump pkgrel

hub.sr.ht: upgrade to 0.13.1

hg.sr.ht: upgrade to 0.27.4

git.sr.ht: upgrade to 0.72.22

py3-scmsrht: upgrade to 0.22.9