Cache the `latest_version` available, to prevent unnecessary requests #70

Job	Run time
Code Quality	17s
E2E (ubuntu-latest)	34s
Test (8.1, --prefer-stable --prefer-lowest, 6.4)	21s
E2E (windows-latest)	1m 25s
Test (8.2, --prefer-stable --prefer-lowest, 7.0)	15s
E2E (macos-latest)	1m 33s
Test (8.1, 6.4)	23s
Test (8.2, 6.4)	16s
Test (8.3, 6.4)	21s
Test (8.4, 6.4)	21s
Test (8.2, 7.0)	22s
Test (8.3, 7.0)	22s
Test (8.4, 7.0)	24s
Test (8.2, 7.1)	18s
Test (8.3, 7.1)	20s
Test (8.4, 7.1)	21s
Test (8.2, 7.2)	17s
Test (8.3, 7.2)	21s
Test (8.4, 7.2)	15s
Test (8.4, 7.2, windows-latest)	21s
Test (8.4, 7.2, macos-14)	15s
Test (8.2, 7.*, dev)	23s
Test (8.3, 7.*, dev)	23s
Test (8.4, 7.*, dev)	17s
	10m 25s

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