roxigraph 0.1.2

• Downgraded oxigraph Rust dependency from 0.5.2 to 0.4.11 to comply with CRAN’s policy requiring packages to build on a rustc release at least two years old. The 0.5.x line declares MSRV 1.87, which CRAN’s reference Linux machines (Fedora 40, rustc 1.86.0) and the 1.77.2 policy ceiling do not satisfy. The 0.4.11 release declares MSRV 1.75 and provides equivalent in-memory and RocksDB-backed RDF/SPARQL functionality. See https://github.com/cboettig/roxigraph/issues/2 for the upgrade plan back to 0.5.x.
• Bumped declared MSRV in DESCRIPTION and Cargo.toml from 1.70 to 1.75 to accurately reflect the new dependency requirement.

roxigraph 0.1.1

• Fixed Rust version compatibility by pinning oxigraph dependency to 0.5.2, ensuring support for Rust 1.70.0+ (resolving issues with newer oxigraph requiring bleeding-edge Rust).
• Added libsnappy-dev to SystemRequirements for RocksDB compression support.
• Fixed linker warnings on macOS ARM64 (M1/M2) builds by setting a default MACOSX_DEPLOYMENT_TARGET.