py3-*: bump pkgrel and update upstream versions

py3-stripe: upgrade to 2.60.0

py3-humanize: upgrade to 3.10.0

py3-gitlab: upgrade to 2.9.0

py3-pyphen: upgrade to 0.11.0

git-send-email.io: depend on py3-srht

py3-srht: upgrade to 0.67.13

git-send-email.io: ditch pystache

git-send-email.io: bump pkgrel

py3-stripe: correct version

Update all non-sr.ht Python packages

py3-celery: upgrade to 5.1.1

py3-humanize: upgrade to 3.9.0

py3-humanize: upgrade to 3.8.0

py3-humanize: upgrade to 3.7.1

py3-stripe: upgrade to 2.58.0

py3-humanize: upgrade to 3.7.0

py3-humanize: upgrade to 3.6.0

py3-celery: upgrade to 5.1.0

py3-kombu: upgrade to 5.1.0