Merge pull request from GHSA-9cfh-vx93-84vv

* Ensure empty incoming buffer when TLS negotiation starts

* cleanup

* Use real nio version

Fix row stream cancel/error behavior (vapor#353)

Add support for UDS and existing Channels (vapor#335)

Make Decodable autoconformance to PostgresDecodable public (vapor#331)

Use NIOThrowingAsyncSequenceProducer (vapor#317)

Add docs outlining changes we made to `PostgresRow/column(name:)` (va…

…por#312)

Co-authored-by: Tim Condon <0xTim@users.noreply.github.com>

Replace Lock with new NIOLock (vapor#305)

SwiftNIO `2.42.0` has deprecated `Lock` and replaced it with a new `NIOLock`. This commit removes all uses of `Lock` and replaces them with `NIOLock`. Further, require new package versions.

Make backend key data optional (vapor#296)