`@tutorialkit/runtime` release includes test files

[AriPerkkio]

Describe the bug

Published @tutorialkit/runtime package contains test files. Let's remove those.

Link to a StackBlitz project which shows the error

No response

Steps to reproduce

Check https://www.npmjs.com/package/@tutorialkit/runtime?activeTab=code

Expected behavior

Test files should be excluded from published release.

Screenshots

No response

Platform

• TutorialKit version: 0.0.2

Additional context

No response