Update winit requirement from 0.28 to 0.30

Updates the requirements on [winit](https://github.com/rust-windowing/winit) to permit the latest version.
- [Release notes](https://github.com/rust-windowing/winit/releases)
- [Changelog](https://github.com/rust-windowing/winit/blob/master/CHANGELOG.md)
- [Commits](rust-windowing/winit@v0.28.0...v0.30.0)

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

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

Cargo.toml

@@ -33,7 +33,7 @@ once_cell = "1.0"
 renderdoc-sys = { version = "1.1.0", path = "./renderdoc-sys" }
 
 glutin = { version = "0.30", optional = true }
-winit = { version = "0.28", optional = true }
+winit = { version = "0.30", optional = true }
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3", features = ["d3d12","d3d11"] }
@@ -43,7 +43,7 @@ wio = "0.2"
 pollster = "0.3"
 wgpu = "0.15"
 wgpu-subscriber = "0.1.0"
-winit = "0.28"
+winit = "0.30"
 
 [workspace]
 members = [".", "renderdoc-sys"]