Bugfixes

stdlib

• (numeric) Fix show unit_separator in #humanize_bytes with empty prefix (#15717, backported from #15683, thanks @straight-shoota)
• (runtime) CRYSTAL_LOAD_DEBUG_INFO=1 fails with -Dexecution_context (#15715, backported from #15704, thanks @ysbaddaden)
• (runtime) Fix -Dtracing raises math overflows on fiber sleep (#15725, backported from #15722, thanks @ysbaddaden)
• (runtime) Fix Fiber::ExecutionContext::Isolated#wait must suspend fiber (#15723, backported from #15720, thanks @ysbaddaden)
• (runtime) Fix run win32 console reader in bare thread (#15726, backported from #15724, thanks @ysbaddaden)

compiler

• (semantic) Do not add ReferenceStorage to Value's subclasses twice (#15718, backported from #15706, thanks @HertzDevil)

Refactor

compiler

• (codegen) Add __crystal_raise_cast_failed for non-interpreted code (#15712, backported from #15708, thanks @HertzDevil)

Infrastructure

• Changelog for 1.16.2 (#15716, thanks @straight-shoota)
• (ci) Fix package shards on MinGW (#15719, thanks @straight-shoota)
• (ci) Only set up Cygwin on Windows CI if truly required (#15713, backported from #15661, thanks @HertzDevil)