Update windows requirement from 0.17.0 to 0.19.0 in /findlib

Updates the requirements on [windows](https://github.com/microsoft/windows-rs) to permit the latest version.
- [Release notes](https://github.com/microsoft/windows-rs/releases)
- [Changelog](https://github.com/microsoft/windows-rs/blob/master/docs/changelog.md)
- [Commits](https://github.com/microsoft/windows-rs/commits)

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

Signed-off-by: dependabot[bot] <support@github.com>

findlib/Cargo.toml

@@ -9,7 +9,7 @@ description = "Crate that exposes GetProcAddress and GetModuleHandleW to detect
 repository = "https://github.com/spyder-ide/pywinpty"
 
 [dependencies]
-windows = "0.17.0"
+windows = "0.19.0"
 
 [build-dependencies]
-windows = "0.17.0"
+windows = "0.19.0"