chore: update engines to Node.js 20.18.1 min

[MikeMcC399]

Situation

package.json includes

cypress-docker-images/package.json

Lines 15 to 17 in 8e68c65

	"engines": {
	"node": ">=18.17"
	},

Node.js 18.17 is not compatible with:

• [email protected] which requires Node.js >=20.18.1
• [email protected] which requires Node.js ^20.0.0

Node.js 18 reached end-of-life on Apr 30, 2025.

Change

Update package.json engines field to >=20.18.1.

This does not affect building images with Node.js as this is containerized and independent from the Node.js version installed in the Docker host system.

Verification

With Node.js 20.18.1, execute

git clean -xfd
npm ci

and confirm that no EBADENGINE warnings are output.

[cypress-app-bot]

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