[dmd-internals] DMD bootstrapping version requirements

[David Nadlinger via dmd-internals]

Hi all,

I must admit that I am not quite up to speed on which configurations are 
exactly tested right now in the wider dlang CI system, but from 
dlang/phobos#5140 [1] it seems like the only C++-based compiler (i.e., 
2.068) remaining is GDC on Travis?

We can of course discuss requiring a multi-step bootstrap in the future. 
I just want to make sure incompatibilities don't slip in unintentionally 
for now.

Best,
David


[1] https://github.com/dlang/phobos/pull/5140