Added maximum and minimum from Base as reductions

[codecov-io]

Codecov Report

Merging #440 into master will increase coverage by 2.03%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #440      +/-   ##
==========================================
+ Coverage   87.25%   89.29%   +2.03%     
==========================================
  Files          11       12       +1     
  Lines         510      607      +97     
==========================================
+ Hits          445      542      +97     
  Misses         65       65

Impacted Files	Coverage Δ
src/basemisc.jl	100% <ø> (+16.66%)	:arrow_up:
src/apply.jl	91.3% <0%> (-5.42%)	:arrow_down:
src/utilities.jl	100% <0%> (ø)	:arrow_up:
src/modify.jl	100% <0%> (ø)	:arrow_up:
src/split.jl	100% <0%> (ø)	:arrow_up:
src/TimeSeries.jl	100% <0%> (ø)
src/combine.jl	98.78% <0%> (+0.29%)	:arrow_up:
src/timearray.jl	97.2% <0%> (+2.16%)	:arrow_up:
src/plotrecipes.jl	17.54% <0%> (+2.99%)	:arrow_up:
src/broadcast.jl	87.87% <0%> (+4.54%)	:arrow_up:
... and 1 more

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[iblislin]

Thanks for your contributions. :+1