fix Issue 13158 - "void has no value" in std.variant.Algebraic (affects D:YAML)
Merge pull request #3793 from 9rnsr/fix13158

[REG2.066a] Issue 13158 - "void has no value" in std.variant.Algebraic (affects D:YAML)
fix Issue 12057 - [ICE], backend/cg87.c 925
change install target to match current release structure
Rename dmd associative array functions to avoid conflict with similarly named druntime functions
Replace Scope's custom allocator with a normal function and clean up interface
Merge pull request #3794 from WalterBright/fix12057

fix Issue 12057 - [ICE], backend/cg87.c 925
Merge pull request #3796 from yebblies/ddmdaav

[DDMD] Rename dmd associative array functions to avoid conflict with similarly named druntime functions
Merge pull request #3798 from braddr/install-fix

change install target to match current release structure
Merge pull request #3795 from yebblies/scopector

[DDMD] Replace Scope's custom allocator with a normal function and clean up interface