dub -> meson

[9il]

Hi all,

'DUB - call to arms' post by Seb
https://forum.dlang.org/post/unimbbqxosxcmjdhtzch@forum.dlang.org

Hope we will move other direction and extend Meson build system 
with better D support and make a new Dlang registry.

Reasons to move forward with Meson:

0. Progressive and large community
1. Has clear python source code: faster to extend, easier to 
maintain.
2. D+Meson already used in production: last year it is a major 
build system for all of Mir and its commercial applications.
3. Meson language is super cool. It is much better than dub for 
commercial projects, for large projects, for library distribution.
4. Ability to compile and configure D code with other languages 
like C/C++.
5. With Meson we don't need to catch up Rust, we can do better 
than Rust with fewer resources.


Best,
Ilya