better handling of non existent versions #163

Job	Run time
clippy	36s
coverage	3m 15s
Rustfmt	14s
Check	19s
Build library (ubuntu-latest, linux)	19s
test (ubuntu-latest)	39s
Build library (ubuntu-latest-arm-8-cores, linux-arm64)	25s
test (ubuntu-latest-arm-8-cores)	1s
Build library (self-hosted, macos, arm64, macos-arm64)	1m 2s
Build library (macos-13, macos)	1m 42s
test (macos-13)	41s
Build library (windows-2022, windows)	1m 11s
test (self-hosted, macos, arm64)	26s
test (windows-2022)	24s
Publish release	0s
	11m 14s

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