LDC 1.27.0

[kinke]

Glad to announce LDC 1.27 - some highlights:

* Based on D 2.097.1+.
* LLVM for prebuilt packages bumped to v12.0.1.
* Prebuilt packages now bundle reggae for faster building of dub 
projects.
* Greatly improved DLL support on Windows, including bundled 
druntime and Phobos DLLs, making it almost as easy as on Posix.
* Prebuilt Linux and Mac packages can show significant compiler 
performance increases due to newly employing the mimalloc 
allocator.
* Important fixes for `-linkonce-templates`, DWARF v5 (e.g. with 
linked-in C[++] parts compiled with gcc 11) and bundled dub 
supporting somewhat longer paths on Windows.

Full release log and downloads: 
https://github.com/ldc-developers/ldc/releases/tag/v1.27.0

Thanks to all contributors & sponsors!