What's Changed
* Gpu support using cupy by loganbvh in https://github.com/loganbvh/py-tdgl/pull/36
* Refactor solver into a class, `tdgl.TDGLSolver`, for better readability and easier profiling
* Add GPU support using CuPy
* Update docs and tests
**Full Changelog**: https://github.com/loganbvh/py-tdgl/compare/v0.5.1...v0.6.0