v1.0.2

Solid mounts. A Solid ref runs when its element is made, before it is in
the page — and an element cloned from a template does not even belong to the
page's document yet. The editor was mounted on it anyway, so the drag handle
had no body to go in and the mount threw. createMatra now mounts once the
element is in place, and the drag handle is built on the first mouse move
when there is no body to put it in at mount. Found by running the install
matrix's Solid app in a real Chrome: happy-dom gives cloned elements a
document, so the DOM checks had passed.

The browser benchmark, rerun. Matra 1.0.1 against Tiptap 3.31, Lexical
0.50 and Slate 0.126 in Chrome 152, all four mounted in one page, the median
of three runs. Matra leads every row; the tables in BENCHMARKS.md, on the
landing page and on the benchmarks page carry the new figures.