py3-*: bump pkgrel and update upstream versions

Update all non-sr.ht Python packages

py3-kombu: upgrade to 5.1.0

py3-kombu: bump pkgrel

py3-kombu: 5.0.2

And fuck GitHub too for not notifying me about these releases

py3-kombu: upgrade to 4.6.9

sr.ht/py3-kombu: bump pkgrel

sr.ht/py3-kombu: upgrade to 4.6.7

Update all dependency packages

Update py3-kombu

Set all pkgrels to zero

Move into subdir for abuild reasons