Bump static-eval and spritesmith (#784)

Bumps [static-eval](https://github.com/browserify/static-eval) to 2.1.0 and updates ancestor dependency [spritesmith](https://github.com/twolfson/spritesmith). These dependencies need to be updated together.


Updates `static-eval` from 0.2.4 to 2.1.0
- [Release notes](https://github.com/browserify/static-eval/releases)
- [Changelog](https://github.com/browserify/static-eval/blob/master/CHANGELOG.md)
- [Commits](browserify/static-eval@0.2.4...v2.1.0)

Updates `spritesmith` from 1.5.0 to 3.4.1
- [Changelog](https://github.com/twolfson/spritesmith/blob/master/CHANGELOG.md)
- [Commits](twolfson/spritesmith@1.5.0...3.4.1)

---
updated-dependencies:
- dependency-name: static-eval
  dependency-type: indirect
- dependency-name: spritesmith
  dependency-type: direct:development
...

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