Updates for VectorizationBase 0.18

[chriselrod]

No description provided.

[codecov]

Codecov Report

Merging #64 (3b2e64a) into master (fe21ae1) will increase coverage by 13.07%.
The diff coverage is 55.93%.

@@             Coverage Diff             @@
##           master      #64       +/-   ##
===========================================
+ Coverage   65.85%   78.92%   +13.07%     
===========================================
  Files          12       12               
  Lines         779      598      -181     
===========================================
- Hits          513      472       -41     
+ Misses        266      126      -140     

Impacted Files	Coverage Δ
src/Octavian.jl	100.00% <ø> (ø)
src/macrokernels.jl	75.00% <ø> (+52.48%)	⬆️
src/global_constants.jl	46.66% <35.13%> (-15.84%)	⬇️
src/matmul.jl	83.60% <89.47%> (-0.61%)	⬇️
src/block_sizes.jl	96.55% <100.00%> (+1.72%)	⬆️

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