CodeQL 2.15.3 supports Swift 5.9, improves C# analysis speed

CodeQL 2.15.3 is rolling out to users of GitHub code scanning on github.com this week, and all new functionality will also be included in GHES 3.12. Users of GHES 3.11 or older can upgrade their CodeQL version.

Important changes in this release include:

For a full list of changes, please refer to the complete changelog for version 2.15.3.