v0.8.0

Release 0.8.0

v0.7.4

• Allow a ScheduledThreadPool to be provided to the pool.

v0.7.3

• Add CustomizeConnection::on_release.
• Fix a rare race condition in Pool::get.

v0.7.2

• Attempt to maintain min_idle when connections are checked out.
• Add Pool::try_get, which does not block if no connection is available.