Update path-slash requirement from 0.1.3 to 0.2.1 (#84)

Updates the requirements on [path-slash](https://github.com/rhysd/path-slash) to permit the latest version.
- [Release notes](https://github.com/rhysd/path-slash/releases)
- [Changelog](https://github.com/rhysd/path-slash/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rhysd/path-slash/commits/v0.2.1)

---
updated-dependencies:
- dependency-name: path-slash
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

api_generator/Cargo.toml

@@ -19,7 +19,7 @@ indicatif = "0.12.0"
 itertools = "0.10.0"
 lazy_static = "1.4.0"
 log = "0.4.8"
-path-slash = "0.1.3"
+path-slash = "0.2.1"
 quote = "~0.3"
 reduce = "0.1.2"
 regex = "1.3.1"