Bump brace-expansion and tmp in /example (#745)

Removes [brace-expansion](https://github.com/juliangruber/brace-expansion). It's no longer used after updating ancestor dependency [tmp](https://github.com/raszi/node-tmp). These dependencies need to be updated together.


Removes `brace-expansion`

Updates `tmp` from 0.2.1 to 0.2.7
- [Changelog](https://github.com/raszi/node-tmp/blob/master/CHANGELOG.md)
- [Commits](raszi/node-tmp@v0.2.1...v0.2.7)

---
updated-dependencies:
- dependency-name: brace-expansion
  dependency-version:
  dependency-type: indirect
- dependency-name: tmp
  dependency-version: 0.2.7
  dependency-type: indirect
...

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