Don't overload `map(f)`

[mcabbott]

Fixes #179

[codecov[bot]]

Codecov Report

Merging #180 (f096fcd) into master (d04c596) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #180   +/-   ##
=======================================
  Coverage   96.94%   96.94%           
=======================================
  Files           4        4           
  Lines         655      655           
=======================================
  Hits          635      635           
  Misses         20       20           

Impacted Files	Coverage Δ
src/fillbroadcast.jl	97.67% <100.00%> (ø)

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[jishnub]

Gentle bump @dlfivefifty (not sure who is maintaining this repo)