bugfix: allow files with -

[alexfarrill]

fixes #430

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Latest commit: 2a6a892c8bb1c353a67a5923a39a8748f3d007e7

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This PR includes changesets to release 3 packages

| Name | Type | | ------------ | ----- | | mailing | Patch | | mailing-core | Patch | | web | Patch |

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