any for an empty array returns false

[jishnub]

Fixes #202

After this

julia> any(Trues(2,0))
false

which matches

julia> any(trues(2,0))
false

[codecov]

Codecov Report

Merging #203 (0a76f01) into master (4845062) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #203   +/-   ##
=======================================
  Coverage   97.89%   97.89%           
=======================================
  Files           4        4           
  Lines         665      665           
=======================================
  Hits          651      651           
  Misses         14       14           

Impacted Files	Coverage Δ
src/FillArrays.jl	97.36% <100.00%> (ø)

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