Bump node-sass from 3.13.1 to 4.14.1 in /docs/pyconpl2017/reveal.js (#5)
Bump node-sass from 3.13.1 to 4.14.1 in /docs/pyconpl2017/reveal.js (#5)

Bumps [node-sass](https://github.com/sass/node-sass) from 3.13.1 to 4.14.1.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/node-sass/compare/v3.13.1...v4.14.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
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