Update dependencies

[JohnAZoidberg]

Would fail to run with the old dependencies:

> cargo run
interface 'wl_output' has no event 4
thread 'main' panicked at /home/zoid/.cargo/registry/src/index.crates.io-6f17d22bba15001f/winit-0.19.5/src/platform/linux/wayland/event_loop.rs:143:11:
called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

One change: I cleared the screen which turns the background white instead of black.

[JohnAZoidberg]

Old dependencies work on Windows but not on Linux.