Improve protocol version handling #366

Job	Run time
build (windows-latest, Debug)	5m 15s
build (ubuntu-latest, Debug)	3m 39s
build (ubuntu-latest, Release)	2m 29s
build (macos-latest, Release)	1m 31s
build (macos-latest, Debug)	1m 41s
build (windows-latest, Release)	5m 17s
publish-coverage / publish-coverage	40s
	20m 32s

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