1.6.1

Compiler

Interpreter

• Interpreter (repl): migrate types even if their size remains the same (#12581, thanks @asterite)
• Unbreak the interpreter on FreeBSD (#12600, thanks @dmgk)
• Fix FFI specs on release builds (#12601, thanks @HertzDevil)
• Adding welcome message to the interpreter (#12511, thanks @beta-ziliani)

Semantic

• Treat single splats with same restriction as equivalent (#12584, thanks @HertzDevil)

Tools

Formatter

• Formatter: escape backslashes in macro literals when subformatting (#12582, thanks @asterite)

Playground

• Fix origin validation in playground server for localhost (#12599, thanks @straight-shoota)

Other

• Fix doc typos in Socket::IPAddress (#12583, thanks @Blacksmoke16)
• Fix building Wasm32 on Crystal 1.6 (Regression) (#12580, thanks @lbguilherme)
• Bump version to 1.6.1-dev (#12588, thanks @straight-shoota)
• Disable failing specs on Windows CI (#12585, thanks @HertzDevil)
• Detect llvm-configXX while building compiler (#12602, thanks @HertzDevil)