Adopt Async Shutdown (#221)

* Drop support for Swift 5.8

* Update dependencies

* Adopt new APIs

* Fix some warnings in Swift 6

* Update CI

Shut down the driver's connection pool safely (#220)

Shut down the EventLoopGroupConnectionPool using an API that doesn't call EventLoopFuture.wait() internally.

Update required versions of dependencies (#218)

Update required dependency versions so users can't accidentally get into states where things won't build. Also fixes a DocC warning.

Update package for Sendable, and other cleanup (#217)

* Package structure updates, remove obsolete files, update CI, bump minimum Swift to 5.8, fixup docs and logo
* Sendable correctness, minor cleanup, use only debug logging in a library
* Make the tests Sendable and async, use singleton MTELG and thread pool, don't use benchmarker's DB for tests

Update for the nested subpath changes in FluentKit (#215)

* Remove no longer needed (well, never needed, really) nested subpath support in SQL converter delegate. General tidying and CI.

* Work around weird bug where Swift 5.7 thinks this particular test model isn't Equatable even though it is

Warn about deprecation of old config methods instead of breaking exis…

…ting code (#212)

* Yield deprecation warnings (instead of compiler errors) for previously working code using the old postgres configuration methods, while setting it up so the compiler correctly defaults to the new ones in ambiguous cases.

Add missing deprecated method (#210)

Add missing deprecated method whose lack causes completely unhelpful compiler errors for those affected.

Updated to use new PostgresKit/PostgresNIO APIs (#207)

* Require Swift 5.7
* Revamp FluentPostgresConfiguration to use SQLPostgresConfiguration and FluentPostgresDatabase to use SQLDatabase for (almost) everything instead of duplicating PostgresKit's work. Ditch uses of old APIs.
* General cleanup
* CI cleanup
* Add API breakage allowlist
* Require the updated PostgresKit

Update PostgresError's DatabaseError conformance for new PostgresNIO …

…behavior (#208)

Update PostgresError's DatabaseError conformance for new PostgresNIO behavior. Fixes broken tests.

Require PostgresKit 2.10.1 for CVE-2023-31136 fix (#206)