Fix deprecated syntax @doc

[femtotrader]

Closes #25

[codecov]

Codecov Report

Merging #26 into master will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #26      +/-   ##
==========================================
+ Coverage   87.27%   87.31%   +0.04%     
==========================================
  Files          13       13              
  Lines         621      623       +2     
==========================================
+ Hits          542      544       +2     
  Misses         79       79

Impacted Files	Coverage Δ
src/io.jl	84.21% <ø> (ø)	⬆️
src/ts.jl	100% <ø> (ø)	⬆️
src/models.jl	85% <ø> (ø)	⬆️
src/combine.jl	89.09% <ø> (ø)	⬆️
src/slice.jl	91.04% <ø> (ø)	⬆️
src/show.jl	82.35% <0%> (+0.53%)	⬆️
src/utils.jl	84.21% <0%> (+0.87%)	⬆️

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[dysonance]

Thanks for the quick fix on this @femtotrader, appreciate the help.

[femtotrader]

A similar PR is available at dysonance/Indicators.jl#15 for Indicators.jl

[dysonance]

Yeah I'm reviewing that one now, thanks again.