version 1.1.0

Changes since 1.0.0:

• The NEON implementation is now enabled by default on AArch64 targets. Previously it was disabled without the "neon" Cargo feature in Rust or the "BLAKE3_USE_NEON=1" preprocessor flag in C. This is still the case on ARM targets other than AArch64, because of the lack of dynamic CPU feature detection on ARM. Contributed by @rsdy.
• The previous change leads to some build incompatibilities, particularly in C. If you build the C implementation for AArch64 targets, you now need to include blake3_neon.c, or else you'll get a linker error like "undefined reference to `blake3_hash_many_neon'". If you don't want the NEON implementation, you need to explicitly set "BLAKE3_USE_NEON=0". On the Rust side, AArch64 targets now require the C toolchain by default. build.rs includes workarounds for missing or very old C compilers for x86, but it doesn't currently include such workarounds for AArch64. If we hear about build breaks related to this, we can add more workarounds as appropriate.
• C-specific Git tags ("c-0.3.7" etc.) have been removed, and all the projects in this repo (Rust "blake3", Rust "b3sum", and the C implementation) will continue to be versioned in lockstep for the foreseeable future.