Ability to do a three dots diff

[erezrokah]

Hi 👋 Thank you for this great action 🚀

On pull requests events it's quite useful to do a three dots diff, otherwise if the PR branch is not up to date with the base branch, the result of the diff is unexpected (changes are calculated from the top of the base branch so the output contains files not changed by the PR).

The fix would be to pass either .. or ... for all the diff commands, for example:

changed-files/get-changed-paths.sh

Line 27 in 27c18b1

sub_commit_pre="$(git diff "$base" "$sha" -- "$sub" | grep '^[-]Subproject commit' | awk '{print $3}')"

If this makes sense I can submit a PR

[github-actions]

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[jackton1]

@erezrokah This is now available in the latest release.

[erezrokah]

Thanks @jackton1 for the super quick fix 🚀