Implement TTY on Deno

[Artyom Sovetnikov]

Implement log.tty for Deno platform.

imgit/src/server/platform/deno.ts

Lines 71 to 72 in f5cda02

 log: { 
     tty: () => {}, // TODO: Implement (https://github.com/elringus/imgit/issues/4) 

https://deno.land/api?s=Deno.stdout