Release D 2.087.0

[Vladimir Panteleev]

On Monday, 15 July 2019 at 12:14:16 UTC, Mike Franklin wrote:
> Many of the implementations in `rt/array` require importing or 
> referencing other implementations in `rt` (e.g. `rt.lifetime`).
>  If they were moved to `core.internal` they would require 
> importing `rt` or peeking into `rt` with various hacks, which 
> exactly what you've said should not be done.

This isn't exactly true. The restriction is that core should not 
*import* rt. Have a look at all the extern(C) definitions in 
Druntime - using extern(C) functions to communicate between the 
compiler and rt, as well as core and rt, is not a "hack", but an 
established mechanism to invoke the low-level implementations in 
Druntime.