Rust bindings to [glsl-optimizer](https://github.com/jamienicol/glsl-optimizer).
To update the version of glsl-optimizer, update the git submodule:
```sh
git submodule update --remote glsl-optimizer
```
Then, if required, regenerate the bindings:
```sh
cargo install bindgen
bindgen wrapper.hpp -o src/bindings.rs
```
Then commit the changes.