v1.9.0

Features and Fixes

• Fix poor performance of the refCount segment (#501)
• Add 'no control' controller (#503)
• Hide actual container from the API (#507)
• Out of line ProgOption::SetProperty for int and std::string (#518)
• Reduce bloat due to statics (#519)

Maintenance

• chore: upgrade checkout step to v4 (#494)
• ci: Check codemeta/zenodo with AUTHORS/CONTRIBUTORS (#498)
• build: Adopt all CMake policies up to 3.30 (#512)
• Update Mac CI nodes (#500, #517)
• build(deps): bump extern/googletest from a1cc8c5 to 7d76a23 (#497, #520)
• Support Boost 1.87 (#521)

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Contributors: @ChristianTackeGSI, @dennisklein, @ktf, @rbx

Full Changelog: v1.8.4...v1.9.0