v2.2.0

Support for SIMD instructions

What's Changed

• Add prefix before version number by @mohanson in #89
• Add a benchmark example using the blake2b by @mohanson in #90
• Optimize debug log by @mohanson in #91
• Add zero initial value for val inst by @mohanson in #92
• Implement SIMD by @mohanson in #93

Full Changelog: v2.1.6...v2.2.0