v0.10.29

Fixed

• Work around a Chromium bug so big operators from the STIX-TWO font will be vertically centered on the math axis. Fixes #66.

Added

• Support \boxslash, \longdiv, \phase, and \textcircled

Changed

• Use the <menclose> element and the notation attribute when possible.
  This will improve accessibility for functions such as \cancel and \boxed.
  Since Chromiumn does not support <menclose>, use CSS in Chromium.