Add Cucumber-JS

[mattwynne]

Please complete the following checklist if your PR is adding new link to the list:

• [x] I've read contributing guidelines
• [x] This PR does not introduce duplicates to the list
• [x] The link is added at the bottom of the list category
• [x] Suggested repository is maintained, have active community, is able to mentor new contributors and have issues with the suggested label
• [x] The link I add follows the suggested pattern:

- [Repository Name](link-to-repository-label) _(label: beginner-friendly-label-in-the-repository)_ <br> Description

Example link formatting:

- [awesome-for-beginners](https://github.com/MunGell/awesome-for-beginners/labels/good-first-contribution) _(label: good-first-contribution)_ <br> A list of awesome beginners-friendly projects.

Note that I used a link to the /contribute page which lists the good first issues and shows a link to the contributing guide, I hope that's OK.