v0.11.0

Changelog

• 0bf5a33: Add the math plugin: TeX formulas rendered to MathML with KaTeX (@Pinta365)
• 1c4d466: Add the social plugin: Open Graph and Twitter card tags (@Pinta365)
• 848c49f: Batch releases: unreleased notes, and deploy docs on release tags (@Pinta365)
• 832c14c: Docs site: a social card image (@Pinta365)
• e8cf2f3: Release notes for v0.11.0, and point the starter and docs at it (@Pinta365)