v0.2.1

Fixed

• Lines set tighter than their glyph boxes (a display heading at line-height: 0.85,
  or any leading below the font's content area) no longer merge into one line. A rect
  joins the row its centre falls in, where it used to join any row it overlapped, and
  consecutive rows of tight type overlap by a few pixels.

Added

• The demo outlines every line, word, character and mask on request, from a
  Boxes control in the panel, so what the split produced is visible on the
  page.
• The demo's header shows the CSS-only reveal next to the scripted one: the
  stylesheet that staggers off the index the split writes, and the two lines of
  script it needs.

Changed

• The demo page reads as a specimen book: the cases sit in named groups with a
  table of contents that stays in view, every case shows its id and what it asks
  of the split, and the controls sit in one panel that keeps out of the text.
  The page is set in Geist and Geist Mono, self-hosted as variable faces. It
  reverts and splits every case again when its column changes width, with no
  reveal a second time, the way a consumer of the library has to, and its
  header shows the code for the reveal and for the resize, in plain browser
  APIs. The README now says so too: a split is a snapshot of one layout, and
  nothing animates it or watches for the next one.

• Releases publish from GitHub Actions. npm run release now ends by pushing
  the tag, and the Release workflow publishes to npm through trusted publishing,
  with provenance, and lists the GitHub release; no npm login or one-time
  password is needed on the machine that cuts the release.