### Motivation:
Some errors do not show up in debug builds. Enabling release mode builds
improves the CI coverage.
### Modifications:
Enable release mode builds for pull requests and scheduled builds on
main.
### Result:
Improved CI coverage.
Motivation:
Swift 5.9 is no longer supported, we should bump the tools version and
remove it from our CI.
Modifications:
* Bump the Swift tools version to Swift 5.10
* Remove Swift 5.9 jobs where appropriate in main.yml, pull_request.yml
Result:
Code reflects our support window.
Motivation:
Swift 6.1 has been released, we should add it to our CI coverage.
Modifications:
Add additional Swift 6.1 jobs where appropriate in main.yml,
pull_request.yml
Result:
Improved test coverage.
### Motivation
We're trying to lock in strict concurrency across the package ecosystem
and standardise on how that's tested.
### Modifications
- Add `StrictConcurrency=complete` feature flag to all targets in the
package manifest
- Remove now superfluous strict concurrency compiler flag in CI runs
- Add a new CI pipeline that tests the package with Swift 6 language
mode.
### Result
- Package configuration consistent with others adopting strict
concurrency.
- Swift 6 language mode pipeline established to catch regressions.
Migrate CI to use GitHub Actions.
### Motivation:
To migrate to GitHub actions and centralised infrastructure.
### Modifications:
Changes of note:
* Adopt swiftlang soundness checks, swift version matrix
* Remove scripts and docker files which are no longer needed
### Result:
Feature parity with old CI.
### Test Plan
Execute CI
Raphael
Rick Newton-Rogers
Si Beaumont