v0.15.2

🐛 Bug Fix

• Add @mdx-js/react to peerDeps for gatsby-plugin-theme-ui #2331 (@hasparus)
• Fix MDXProvider example #2329 (@shawnbot)
• fix(typography): drop broken dev dependencies (@hasparus)
• fix(match-media): add dev dependency on react-dom (@hasparus)
• fix(theme-ui): remove redundant dependency on @theme-ui/mdx from package.json (@hasparus)

🏠 Internal

• docs: Mention that /core doesn't add global styles #2333 (@lachlanjc)
• docs: Group & update all MDX-related docs #2339 (@lachlanjc)

Authors: 3

• Lachlan Campbell (@lachlanjc)
• Piotr Monwid-Olechnowicz (@hasparus)
• Shawn Allen (@shawnbot)