Minor Updates for CI/CD

[burgholzer]

This PR brings some minor improvements related to the CI/CD pipeline and Python packages:

• 🏗️ switch to PEP 517 pyproject.toml
• 🐛 🍎: deploying under macOS now produces fat binaries (i.e., for x86_64 and arm64 architectures). This allows to effectively build universal2 wheels for Python 3.8 onwards and eventually makes the wheels work on M1-based Macs
• ⬆️ updated cibuildwheel to 2.3.0
• 🏗️ increase max CMake version to 3.22
• 🔖 increase version to 1.7.3

[codecov]

Codecov Report

Merging #24 (9b5e157) into master (0578d65) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master     #24   +/-   ##
======================================
  Coverage    80.3%   80.3%           
======================================
  Files          41      41           
  Lines        6603    6603           
======================================
  Hits         5305    5305           
  Misses       1298    1298           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 0578d65...9b5e157. Read the comment docs.

[hillmich]

LGTM