Prepare for release v1.6.0 (#366) #1201

Job	Run time
Test with nox (ubuntu-20.04, 3.11, ci_checks_max)	1m 50s
Test with nox (ubuntu-20.04, 3.11, pytest_min)	1m 21s
Test documentation website generation	0s
Cross-arch tests with nox (arm64, ubuntu-20.04, 3.11, pytest_min)	7m 16s
Cross-arch tests with nox (arm64, ubuntu-20.04, 3.11, pytest_max)	7m 16s
Build distribution packages	17s
Test package installation in different architectures	1m 18s
Test with nox	1s
Cross-arch tests with nox	1s
Publish documentation website to GitHub pages	38s
Create GitHub release	0s
Publish packages to PyPI	0s
	19m 58s

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