cargo update deps and mark 7.1.0-beta.1

Mark 7.1.0

Better docker tags + main building docker

Restore docker building openssl, ring is TOO slow

Fixing linux docker image release job

Clear have_bitfield on error

Merge pull request #202 from ikatson/update-e2e-test-delete

Update e2e test to test deletion

Merge pull request #189 from ikatson/limit-init

Limit concurrency of torrent initialization (fix #139)

Fixing macos CI build

6.0.0-beta.2