Bump psy/psysh from 0.12.7 to 0.12.19 (#30)

Bumps [psy/psysh](https://github.com/bobthecow/psysh) from 0.12.7 to 0.12.19.
- [Release notes](https://github.com/bobthecow/psysh/releases)
- [Commits](bobthecow/psysh@v0.12.7...v0.12.19)

---
updated-dependencies:
- dependency-name: psy/psysh
  dependency-version: 0.12.19
  dependency-type: indirect
...

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