v2.1.22: Fix non-incremental sysimage builds on Julia 1.11

Summary

The purpose of this release is to fix non-incremental sysimage builds on Julia 1.11.

The bug in question was #976, and the bugfix PR was #987.

What's Changed

• Do not put project stdlibs into the base (non-incremental) sysimage by @KristofferC in #987
• Bump version number from 2.1.21 to 2.1.22 by @DilumAluthge in #992

CI (Continuous Integration)

• CI: Run the build-mylib job on both LTS (1.10) and stable (currently 1.11) by @DilumAluthge in #985

Full Changelog

Full Changelog: v2.1.21...v2.1.22