Fix CI for examples

[Michael-F-Bryan]

It looks like CI for building the examples is failing as of #361, but because that job wasn't set as a "required" job, auto-merge merged the PR anyway.

I believe the root cause is that we're using node v16 in CI, but esbuild requires at least v18.

npm WARN cleanup Failed to remove some directories [
npm WARN cleanup   [
npm WARN cleanup     '/home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules',
npm WARN cleanup     [Error: ENOTEMPTY: directory not empty, rmdir '/home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules/@swc/core'] {
npm WARN cleanup       errno: -39,
npm WARN cleanup       code: 'ENOTEMPTY',
npm WARN cleanup       syscall: 'rmdir',
npm WARN cleanup       path: '/home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules/@swc/core'
npm WARN cleanup     }
npm WARN cleanup   ],
npm WARN cleanup   [
npm WARN cleanup     '/home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules/@swc',
npm WARN cleanup     [Error: ENOTEMPTY: directory not empty, rmdir '/home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules/@swc/core'] {
npm WARN cleanup       errno: -39,
npm WARN cleanup       code: 'ENOTEMPTY',
npm WARN cleanup       syscall: 'rmdir',
npm WARN cleanup       path: '/home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules/@swc/core'
npm WARN cleanup     }
npm WARN cleanup   ]
npm WARN cleanup ]
npm ERR! code 1
npm ERR! path /home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules/esbuild
npm ERR! command failed
npm ERR! command sh -c node install.js
npm ERR! /home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules/esbuild/install.js:133
npm ERR!     throw new Error(`Expected ${JSON.stringify(versionFromPackageJSON)} but got ${JSON.stringify(stdout)}`);
npm ERR!           ^
npm ERR! 
npm ERR! Error: Expected "0.19.10" but got "0.19.9"
npm ERR!     at validateBinaryVersion (/home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules/esbuild/install.js:133:11)
npm ERR!     at /home/runner/work/wasmer-js/wasmer-js/examples/ffmpeg-react/node_modules/esbuild/install.js:286:5

[github-actions]

⏱ Workflow Timer ⏱

Make sure you keep an eye on build times!

The goal is to keep CI times under 10 minutes so developers can maintain a fast edit-compile-test cycle.

Run	Compile and Test	Build Examples
main	6mins 16s	3mins 44s
675c77b	5mins 55s	4mins 2s

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