Update errno requirement from 0.2.5 to 0.3.0 (#94)

Updates the requirements on [errno](https://github.com/lambda-fairy/rust-errno) to permit the latest version.
- [Release notes](https://github.com/lambda-fairy/rust-errno/releases)
- [Changelog](https://github.com/lambda-fairy/rust-errno/blob/main/CHANGELOG.md)
- [Commits](lambda-fairy/rust-errno@v0.2.5...v0.3.0)

---
updated-dependencies:
- dependency-name: errno
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -10,7 +10,7 @@ license = "MIT"
 edition = "2018"
 
 [dependencies]
-errno = "0.2.5"
+errno = "0.3.0"
 libc = "^0.2.62"
 
 [features]