This release raises the overall quality of python-constraint with a wide variety of improvements, such as:

• Automatic performance benchmarking and validation with real-world cases and automatic reporting (see#93).
• Preparations for free-threading (no GIL) capabilities (see#94).
• Removed NumPy dependency in micro benchmarks, updated dependencies, and optimized test interfaces.
• Changed development status from Beta to Production / Stable.

Full Changelog:2.1.0...2.2.0