Bump jimfs from 1.1 to 1.2
Bump jimfs from 1.1 to 1.2

Bumps [jimfs](https://github.com/google/jimfs) from 1.1 to 1.2.
- [Release notes](https://github.com/google/jimfs/releases)
- [Commits](https://github.com/google/jimfs/compare/v1.1...v1.2)

---
updated-dependencies:
- dependency-name: com.google.jimfs:jimfs
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
square/javapoet,square/javawriter