chore(deps): bump @jspm/generator from 1.1.11 to 1.1.12 (#2546)

Bumps [@jspm/generator](https://github.com/jspm/generator) from 1.1.11 to 1.1.12.
- [Release notes](https://github.com/jspm/generator/releases)
- [Commits](jspm/generator@1.1.11...1.1.12)

---
updated-dependencies:
- dependency-name: "@jspm/generator"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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