DO NOT MERGE: demonstrate no-dupe windows 0.59 dep.

You can recreate this commit by:

1. Applying a `patch.crates-io.libloading` to point to the upstream PR
   allowing `windows` 0.59 in its dep. range.
2. Run `cargo update`.

Author: ErichDonGubler

Cargo.lock

@@ -84,3 +84,6 @@ unused_result_ok = "warn"
 unused_trait_names = "warn"
 unwrap_used = "warn"
 unwrap_in_result = "warn"
+
+[patch.crates-io]
+libloading = { git = "https://github.com/erichdongubler-contrib/rust_libloading", branch = "windows-0.59" }