bug: the main binary shadow aoc-cli

The `download` script run `aoc` 

https://github.com/fspoettel/advent-of-code-rust/blob/9bc635a056d11741e28fdc388aa2871b48465237/src/bin/download.rs#L76

But because the package's name is also `aoc`, when it is built it generates a `aoc.exe` that shadows `aoc-cli`.

