v0.12.0

Changelog

• fb3780c: Describe share images, and note images without alt text (@Pinta365)
• 2261fc9: Format social_test.go (@Pinta365)
• 5cc2573: Publish to Homebrew and Scoop, and build for Intel Macs again (@Pinta365)
• a145af5: Release notes for v0.12.0, and point the starter and docs at it (@Pinta365)