D enters Tiobe top 20

[Ola Fosheim Grøstad]

Ok, so here is another github metric that is more interesting. 
Doing a "language:d" search and then look at the number of 
_users_:

Zig: 10
Pony: 25
Nim:  400
Crystal: 500
Ada:  600
Vala: 800
D:     2000
Pascal: 12000
Dart: 13000
Rust: 16000
Swift: 24000
Go:   128000
C++: 706000

Clearly, this metric favours older languages. It would have been 
better to look at new repos only, but I don't know if that is 
possible with the github interface.