Update libloading requirement from 0.7.0 to 0.8.0 (#67)

Updates the requirements on [libloading](https://github.com/nagisa/rust_libloading) to permit the latest version.
- [Release notes](https://github.com/nagisa/rust_libloading/releases)
- [Commits](nagisa/rust_libloading@0.7.0...0.8.0)

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

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

Cargo.toml

@@ -16,7 +16,7 @@ documentation = "https://docs.rs/hassle-rs"
 [dependencies]
 bitflags = "2"
 com = { version = "0.6", features = ["production"] }
-libloading = "0.7"
+libloading = "0.8"
 thiserror = "1.0.2"
 widestring = "1"