py3-importlib-metadata: add py3-packaging to checkdepends
sr.ht/py3-celery: add importlib-metadata dependency
sr.ht/py3-importlib-metadata: new aport
sr.ht/py3-billiard: upgrade to 3.6.1.0
sr.ht/py3-kombu: upgrade to 4.6.7
sr.ht/py3-celery: upgrade to 4.4.0
sr.ht/py3-emailthreads: upgrade to 0.1.2
py3-srht: drop py3-flask-login dependency
Normalize prometheus packages
prometheus/alertmanager: update to 0.19.0
prometheus/grafana: new APKBUILD
prometheus-node-exporter: upgrade to 0.18.1
prometheus: upgrade to 2.14.0
py3-stripe: upgrade to 2.40.0
git.sr.ht: update to Go version of update-hook
git.sr.ht: build Golang gitsrht-keys
git.sr.ht: correct path to gitsrht-shell
git.sr.ht: add gitsrht-shell Go build
Update mercurial and hg-evolve
Mercurial package is updated with the latest edge upstream to
install mercurial 5.1.2 with py3. Evolve is updated to 9.2.1
and also installs with py3.