Allow passing --version flag #1530

Job	Run time
macOS--mono	3m 9s
linux-oldLTS-github--dotnet-and-xbuild	4m 42s
macOS--dotnet6-and-mono	4m 13s
linux-oldLTS-vanilla--newmono	4m 2s
linux-newLTS-github--dotnet-and-msbuild	4m 16s
linux-newLTS-github--dotnet-and-xbuild	4m 11s
linux-newLTS-vanilla--stockmono	3m 17s
linux-oldLTS-github--dotnet-and-msbuild	4m 34s
linux-oldLTS-vanilla--stockmono	2m 49s
linux-newLTS-vanilla--dotnet6	4m 1s
linux-newLTS-vanilla--newmono	4m 21s
windows--dotnet6	6m 46s
windows--legacyFramework	12m 5s
sanity-check	0s
publish	0s
	1h 2m 26s

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