Inter Math 1.0.0

The first release.

• Every symbol KaTeX documents drawn from Inter, variable in weight (100–900)
  and optical size (14–32): KaTeX's upright, italic, AMS, blackboard and size
  fonts; typewriter, Fraktur, calligraphic and script letters stay in KaTeX's.
• setMathFont("inter" | "classic"): KaTeX lays math out with Inter Math's
  metrics, rules, surds and arrows at any weight, or with its own.
• On npm as inter-math, with KaTeX 0.19.0 inside (inter-math/katex) and
  its stylesheet (inter-math/katex.css, inter-math/katex.min.css).
• InterMath-1.0.0.zip: the variable fonts as TTF, and the KaTeX integration.