maint: bump version

Cargo.toml

 [package]
 name = "clean-path"
 description = "A safe fork of the `path-clean` crate"
-version = "0.2.0"
+version = "0.2.1"
 authors = ["Frank de Jong <f.jin@protonmail.com>"]
 repository = "https://gitlab.com/foo-jin/clean-path"
 documentation = "https://docs.rs/clean-path"