Add docs for using telemetry listener with Ecto

Clarify telemetry docs

Document disconnect_all/3 (#322)

Avoid deprecated Elixir syntax

Remove unnecessary test file

Avoid deprecated Elixir syntax

Revert handle_info/2 callback (#319)

Document handle_info/2 (#317)

mix format

Proxy info messages to the adapter (#316)

Increase queue_interval to less conservative values

Remove unused super call

Enable descentralized counters (#314)

Improve test reliability

Enable descentralized counters

Use is_pid and improve doc (#313)

Remove duplicated doc entry

Release v2.7.0

Add a connection listener that emits telemetry events (#311)

Documentation improvements

Add usage instructions

Address review comment

Add a connection listener that emits telemetry events

Add a connection listener that emits telemetry events

Bugfix

Remove unnecessary key from connection state

Emit telemetry events on connect/disconnect, move listeners to teleme…

Emit telemetry event on disconnect