feat!: Upgrade to Binaryen v129 - #276

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e, ocaml/setup-ocaml@c2e6bb92370612b89f302c3aaefa1da45ee2d702. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/