Continuous integration

Add release-plz for automated releases #62

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Run time

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Job	Run time
Tests / OS: macos-11 - stable	1s
Tests / OS: windows-2022 - stable	1m 17s
Tests / OS: ubuntu-22.04 - stable	31s
Tests / OS: macos-11 - beta	1s
Tests / OS: windows-2022 - beta	29s
Tests / OS: ubuntu-22.04 - beta	13s
Tests / OS: macos-11 - nightly	1s
Tests / OS: windows-2022 - nightly	38s
Tests / OS: ubuntu-22.04 - nightly	13s
Tests / OS: macos-11 - 1.23.0	1s
Tests / OS: windows-2022 - 1.23.0	1m 17s
Tests / OS: ubuntu-22.04 - 1.23.0	1m 15s
	5m 57s