Support R 4.6.0 on macOS#30
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Update the default LLVM OpenMP download from 19.1.0 to 19.1.5 to match the current release on mac.r-project.org. The 19.1.x runtime covers Apple clang 1700.x and up (Xcode 16.3 through 26.x).
R 4.6 uses the same gfortran 14.2 universal compiler and /opt/R install paths as R 4.5; on Apple Silicon the recipes binaries now come from the auto-detected darwin23/arm64 (Sonoma) repository.
Centralize the supported R version window behind minimum/maximum_supported_r_version() and replace the repeated is_r_version("4.x") || ... chains with is_r_version_at_least() / is_r_version_supported(), so a future release that keeps the toolchain is a one-line change.
Also restore the missing 0.0.6.2 (macOS Tahoe) NEWS entry.
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Adds support for R 4.6.0, which uses the same gfortran 14.2 universal compiler and
/opt/Rinstall paths as R 4.5. On Apple Silicon therecipesbinaries now come from the auto-detecteddarwin23/arm64(Sonoma) repository.Centralizes the supported R version window behind
minimum_supported_r_version()/maximum_supported_r_version()and replaces the repeatedis_r_version("4.x") || ...chains with range checks, so a future release that keeps the toolchain is a one-line change. Also refreshes the bundled OpenMP runtime to 19.1.5 and restores the missing 0.0.6.2 (macOS Tahoe) changelog entry.