v0.8.0

Added

• TypeScript type errors are now displayed inline. Previously, only syntax
  errors were displayed. Type errors may take slightly longer to appear than
  syntax errors, because they require fetching .d.ts files and running a more
  expensive compiler pass.

Changed

• [BREAKING] Removed --playground-error-border property, and updated
  inline error style from a dashed border to a red squiggle.