vir-simd 0.3.200 (Beta 1)

What's Changed

• Fix build with older GCC and Apple Clang.
• Add vir-simd version #27
• Check preconditions #31
• Add assume_matching_size execution policy modifier #32
• Reduce template bloat in simd fallback #33
• Fix tuple of complex simdize #34
• Let simdize<T> be T (instead of ill-formed) if T cannot be simdized.

Full Changelog: v0.3.1...v0.3.200