fix: add transform-origin and transformorigin mappings

[piotr-cz]

Summary

Fixes #957

React 19 added runtime validation for transformOrigin attribute in development mode.
When it finds transform-origin attribute, it shows a message:

Invalid DOM property transform-origin. Did you mean transformOrigin?

This PR adds missing mappings.

Test plan

Run library on such SVG image:

<?xml version="1.0" encoding="UTF-8"?>
<svg
  xmlns="http://www.w3.org/2000/svg"
  viewBox="-10 -10 420 420"
>
  <path
    d="M 200 0 A 200 200, 0, 0, 1, 375 100 L 200 200 Z"
    transform-origin="200 200"
  />
</svg>

[vercel]

Deployment failed for project svgr with the following error:

The `vercel.json` schema validation failed with the following message: should NOT have additional property `public`

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Project	Deployment	Actions	Updated
svgr	Error		Sep 30, 2026 7:33am UTC