Changelog: ARO 0.1.0-alpha.3

[KrisSimon]

This patch fixes the same double-binding problem that affected alpha.2 in the Exec and Request actions, and regenerates all expected.txt test fixtures to reflect current output. Automated Mastodon release announcements were wired up so each new release is posted to the project account automatically.

[KrisSimon]

Changelog

• Fixed double-binding bug in Exec and Request actions
• Regenerated all expected.txt test fixtures to reflect current output
• Automated Mastodon release announcements wired up for each new release