Update libloading requirement from 0.7 to 0.8 (#148)

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
...

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

Author: dependabot[bot]

Cargo.toml

@@ -28,7 +28,7 @@ ci = []
 [dependencies]
 bitflags = "2.0"
 float-cmp = "0.9"
-libloading = "0.7"
+libloading = "0.8"
 once_cell = "1.0"
 renderdoc-sys = { version = "1.0.0", path = "./renderdoc-sys" }