Mere CLI v0.5.19

What's Changed

• Fix root auth handling for no-auth apps by @a-github-name in #75
• Test bundled Business mail attachments by @a-github-name in #76
• Release Mere CLI 0.5.19 dogfooding remediation by @a-github-name in #77

Full Changelog: v0.5.18...v0.5.19