[SAoC2022] Replace libdparse with dmd-as-a-library in D-Scanner week 4

[rikki cattermole]

On 19/10/2022 3:36 AM, Lucian Danescu wrote:
> 1) I will have to create for my project a custom lexer that
> extends the `dmd` one

That wouldn't be a custom lexer, however you don't need to do that.

https://github.com/dlang/dmd/blob/master/compiler/test/dub_package/lexer.d