chore: update dompurify to ^3.2.1

As [DOMPurify 3.2.0 added TypeScript types][1], this means that we can
remove our dependency on the `@types/dompurify` package.

[DOMPurify 3.2.0 also adds the `HTML_INTEGRATION_POINTS` option][2],
which adds back support for `<foreignObject>`,
[which broke in DOMPurify 3.1.7.][3]

[1]: https://github.com/cure53/DOMPurify/releases/tag/3.2.0
[2]: e4caa67971
[3]: de2c05cd54

scripts/tsc-check.ts

@@ -38,7 +38,6 @@ const SRC = {
           // to match the real `package.json` values
           'type-fest': '*',
           '@types/d3': '^7.4.3',
-          '@types/dompurify': '^3.0.5',
           typescript: '*',
         },
       },