v0.5.1

What's Changed

• Clarify the license of net-smtp by @tmtm in #85
• Enabled windows-latest on GHA by @hsbt in #87
• Fix typo in test methods by @tas50 in #89
• Restore gemspec file to gem package by @hsbt in #90

New Contributors

• @tas50 made their first contribution in #89

Full Changelog: v0.5.0...v0.5.1