Add `flutter-version-file` #13

Job	Run time
test_print_output	12s
test_cache (ubuntu-latest)	12s
lint_shellcheck	3s
test_cache (windows-latest)	10s
test_channel (ubuntu-latest, stable)	30s
test_cache (macos-latest)	19s
test_channel (ubuntu-latest, beta)	31s
test_cache (macos-13)	17s
test_channel (ubuntu-latest, master)	25s
test_cache (macos-14)	19s
test_channel (windows-latest, stable)	10s
test_channel (windows-latest, beta)	11s
test_channel (windows-latest, master)	10s
test_channel (macos-latest, stable)	1s
test_channel (macos-latest, beta)	1s
test_channel (macos-latest, master)	1s
test_channel (macos-13, stable)	1s
test_channel (macos-13, beta)	1s
test_channel (macos-13, master)	26s
test_channel (macos-14, stable)	1s
test_channel (macos-14, beta)	1s
test_channel (macos-14, master)	1s
test_channel (ubuntu-latest, main)	20s
	4m 23s

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