4. Make sure to avoid using `npm run build`! This will remove all your dev dependencies (in order to reduce space used). Instead, use `npm run once` to compile and build in non-dev mode.
5. Begin developing.
## Don't forget to...
- ...update the [changelog](CHANGELOG.md) and any other necessary docs.
- ...update the version numbers in `package.json` and `package-lock.json`.
- ...make sure the test suite passes by running `npm test`.