QCEC 2.1.0 Release: More Wheels, Fewer Requirements, and Python 3.11

This release brings lots of CI/CD improvements to QCEC. Most importantly, with this release QCEC offers binary wheels for all platforms that Qiskit offers them. Furthermore, it drops the superfluous retworkx requirement from QCEC.

Additions

• 👷 CI workflow for (emulated) s390x and ppc64le wheels by @burgholzer in #198
• ✨ Cirrus CI for natively building Apple Silicon and Linux ARM wheels by @burgholzer in #192
• 📦 Support Versioning in Git Archives by @burgholzer in #187
• 🐍 Python 3.11 tests by @burgholzer in #193

Removals

• 🔥Remove retworkx requirement by @dependabot in #186
• 🔥Drop LGTM by @burgholzer in #194
• 🔥Drop deprecated JKQ shim by @burgholzer in #195
• 🔥musllinux wheels are no longer available as of this release since Qiskit does not provide them as well

Full Changelog: v2.0.0...v2.1.0