community/py3-pygit2: update dependencies

six is no longer required; and a new dependency is necessary.
7 jobs for !8718 with py3-pygit2 in 1 minute and 56 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Lint
passed lint #132269
docker-alpine x86_64

00:00:19

 
  Build
passed build-aarch64 #132274
docker-alpine ci-build aarch64

00:01:08

passed build-armv7 #132275
docker-alpine ci-build armv7

00:01:13

passed build-ppc64le #132273
docker-alpine ci-build ppc64le

00:01:34

passed build-s390x #132272
docker-alpine ci-build s390x

00:00:39

passed build-x86 #132271
docker-alpine ci-build x86

00:01:11

passed build-x86_64 #132270
docker-alpine ci-build x86_64

00:00:46