With the new prepare script, our current actions setup builds Preact 4 times:

Build Job:

1. The build job runs npm ci which builds as part of the prepare script
2. The build job then runs npm run build

Test Job:

3. The test job runs npm ci which builds as part of the prepare script
4. The test job then runs npm test which runs npm run build

Since this is redundant I've removed the npm run build step from the build jobs. However I left the extra build in test for now. I thought this might still be useful to support the development scenario where you make local changes and then run npm test to validate them. If npm test doesn't do a build, then developers need to update their habits to also do a build before running npm test, or else npm test will test the previous build without their changes.

Let me know what you think!