Merge tag 'v3.1.0' into develop

dropped python 3.6 support because it is deprecated and so we can somewhat use | as type union v3.1.0

# -----BEGIN PGP SIGNATURE-----
#
# iQIzBAABCgAdFiEEFJMl/RWQTpxOuJ6V6BRE6c4faV0FAmHhn74ACgkQ6BRE6c4f
# aV2FqA//bxA6/jCwoAUhNywa0v1NLH/jp/PaRGO9yuSVFN8MbCva3M4WY58xTsiN
# dr8XXqNVntTv6tzhw20lPo93lbCtPqNsmlwMMhmcqKylNEw7S4gMnjhEGrfomupg
# a/4GGGQ7Ylky2q1Kevd8rFULJJEU+0MYMQBlLhUPGrE7iJp4lS/XzhU4vfcLx9XT
# DD4vbp40REPWA68YSnoySi7SLKP+PqwjY58fCTaoDnxyhT+0PKc+R1mqiSR8gPuQ
# 0EwehkZBqR+pyN21URsYbIGu7vymfxDG2SAsVZeQgiGiP0GvnangH0Vn0NuT5onr
# DGmJbfEVjAwElIsm8U1C94M4o6SNMHLUEtFuS5M0YS2tQhBKlN9sMx3703F0hsaF
# wpHe5NpPqJ1Fcedm5f5RPEfb9XWImFltQ/GefM1PB3rQBh/OVZDk0BNuljJl8p6D
# A0VHhZIFxs44hB97xjTyHN0DhoL4tZpOC5frQFNddozNN+ruXJfVER9t/ixBN3Dc
# yZv5biK3PlAn6F2OYtVhyPFmQTtVkT8m4vZDbqHn2HJa8+dhBzReTB3TLeu9jjjz
# GCA9pDH8d7kk9LGMeiIhwZNTEY7dwO988QMwlb/GJorYT9UrztUfII1UUk+1HpOT
# W8tXEkbaQz+zQvmngTR7l3XskU/SoTd6bEkmniWX38zbbWEG7QA=
# =gwfT
# -----END PGP SIGNATURE-----
# gpg: Signature made Fri Jan 14 17:07:26 2022 CET
# gpg:                using RSA key 149325FD15904E9C4EB89E95E81444E9CE1F695D
# gpg: Good signature from "Rick van Hattem <wolph@wol.ph>" [ultimate]
# gpg:                 aka "[jpeg image of size 9662]" [ultimate]

Author: wolph