Bump trim-newlines and node-sass

Bumps [trim-newlines](https://github.com/sindresorhus/trim-newlines) to 3.0.1 and updates ancestor dependency [node-sass](https://github.com/sass/node-sass). These dependencies need to be updated together.


Updates `trim-newlines` from 1.0.0 to 3.0.1
- [Release notes](https://github.com/sindresorhus/trim-newlines/releases)
- [Commits](https://github.com/sindresorhus/trim-newlines/commits)

Updates `node-sass` from 5.0.0 to 8.0.0
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](sass/node-sass@v5.0.0...v8.0.0)

---
updated-dependencies:
- dependency-name: trim-newlines
  dependency-type: indirect
- dependency-name: node-sass
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]