Update naga requirement from 0.14 to 0.19

Updates the requirements on [naga](https://github.com/gfx-rs/wgpu) to permit the latest version.
- [Release notes](https://github.com/gfx-rs/wgpu/releases)
- [Changelog](https://github.com/gfx-rs/wgpu/blob/trunk/CHANGELOG.md)
- [Commits](gfx-rs/wgpu@v0.14.0...v0.19.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -13,7 +13,7 @@ include = ["/Cargo.toml", "/LICENSE", "/README.md", "/src/**"]
 
 [dependencies]
 syn = { version = "2.0", features = [] }
-naga = { version = "0.14", features = ["wgsl-in", "wgsl-out"] }
+naga = { version = "0.19", features = ["wgsl-in", "wgsl-out"] }
 naga-to-tokenstream = "0.4"
 proc-macro2 = "1.0"
 quote = "1.0"