[Issue 19772] Support for VS2019

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19772

--- Comment #5 from Rainer Schuetze <r.sagitario at gmx.de> ---
Ah, ok. dmd on master branch already supports VS2019, but the installer does
not.

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