Add `flutter-version-file` #29

Job	Run time
test_version_file (ubuntu-latest)	37s
test_channel (ubuntu-latest, stable)	33s
test_cache (ubuntu-latest)	12s
lint_shellcheck	4s
test_print_output	16s
test_channel (ubuntu-latest, beta)	35s
test_cache (windows-latest)	1m 20s
test_channel (ubuntu-latest, master)	41s
test_cache (macos-latest)	53s
test_channel (windows-latest, stable)	1m 41s
test_cache (macos-13)	45s
test_channel (windows-latest, beta)	1m 31s
test_cache (macos-14)	29s
test_channel (windows-latest, master)	1m 29s
test_channel (macos-latest, stable)	57s
test_channel (macos-latest, beta)	48s
test_channel (macos-latest, master)	1m 38s
test_channel (macos-13, stable)	1m 0s
test_channel (macos-13, beta)	57s
test_channel (macos-13, master)	1m 3s
test_channel (macos-14, stable)	46s
test_channel (macos-14, beta)	54s
test_channel (macos-14, master)	53s
test_channel (ubuntu-latest, main)	41s
	20m 43s

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