httpgd

• Fix compilation failure with 'Clang 21' (middleware default constructor).
• Add Clang 21 R CMD check to CI.

CRAN status:

• Fix compilation failure with 'Clang 21' (vendored 'CrowCpp' tuple member initialization).

CRAN status:

• Fix compilation failure with 'Clang 21' (vendored 'CrowCpp' CORS middleware default constructor).

CRAN status:

• Update vendored 'CrowCpp' library to v1.2.1.
• Update 'AsioHeaders' dependency to >= 1.28.2 (fixes macOS deprecation warnings).
• Remove unused code causing compiler warnings.
• Modernize build system and CI/CD workflows.
• Require R >= 4.2.0.

CRAN status:

What's Changed

• Fix 'Clang 19' deprecation warning.
• Remove whitespace after operator"" by @MichaelChirico in https://github.com/nx10/httpgd/pull/214

Full Changelog: https://github.com/nx10/httpgd/compare/v2.0.3...v2.0.4