Support dashes in filenames

[m5r]

Describe your changes

Fixes #447

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [ ] If it is a core feature, I have added thorough tests.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 348c086481e27a148e01c14265c144eca7790b46

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

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[alexfarrill]

Thanks for the PR @m5r ! I'm taking a look and if it works, I'll plan to include in the next release (today). Thanks for using Mailing! Alex