Suggestion: perl-version-file input support?

[stefafafan]

When using this action with a .perl-version file in the repo, I will probably do something like this:

- name: Extract perl version
  run: echo "PERL_VERSION=$(cat .perl-version)" >> $GITHUB_ENV

- name: Setup Perl
  uses: shogo82148/actions-setup-perl@v1
  with:
    perl-version: ${{ env.PERL_VERSION }}

It will be convenient if perl-version-file input was supported, something like:

- name: Setup Perl
  uses: shogo82148/actions-setup-perl@v1
  with:
    perl-version-file: '.perl-version'

What do you think?

Some of the other actions support this.

• Support .nvmrc actions/setup-node#338
• Add go-version-from-file option actions/setup-go#62
• add support for python-version-file actions/setup-python#336