Bump wgpu from 0.18.0 to 0.19.0

Bumps [wgpu](https://github.com/gfx-rs/wgpu) from 0.18.0 to 0.19.0.
- [Release notes](https://github.com/gfx-rs/wgpu/releases)
- [Changelog](https://github.com/gfx-rs/wgpu/blob/trunk/CHANGELOG.md)
- [Commits](gfx-rs/wgpu@v0.18.0...v0.19.0)

---
updated-dependencies:
- dependency-name: wgpu
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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