(v0.7.0) Breakpoints with custom media queries

🎉 This release contains work from new contributors! 🎉

Thanks for all your work!

❤️ Carolin Maisenbacher (@carolinmaisenbacher)

❤️ Alex Chan (@alexanderchan)

🚀 Enhancement

• Have breakpoints accept custom media queries #1653 @carolinmaisenbacher

🐛 Bug Fix

• gatsby-plugin-theme-ui, gatsby-theme-code-recipes,
  gatsby-theme-style-guide, gatsby-theme-ui-layout
  • Set gatsby peerDependency more explicit to ^2.0.0 || ^3.0.0. #1640 @LekoArts

⚙️ Internal

• all packages
  -Build packages with Preconstruct 2 #1423 (@alexanderchan @hasparus)

Authors: 4

• Alex Chan (@alexanderchan)
• Carolin Maisenbacher (@carolinmaisenbacher)
• Lennart (@LekoArts)
• Piotr Monwid-Olechnowicz (@hasparus)