v3.2.0

Use upstream juju/txn v3.2.0 which accepts the request to use server side txns without attempting to do any subsequent checks.

v3.1.0

Update to use upstream juju/txn v3.1.0

v2.0.0

What's Changed

• Use github.com/juju/mgo/v2 and convert to go mod by @wallyworld in #29
• Update to go 1.17 and latest upstream by @wallyworld in #30

Full Changelog: https://github.com/juju/blobstore/commits/v2.0.0