Add nanmath option

[YingboMa]

[codecov-commenter]

Codecov Report

Merging #941 (66a4f13) into master (d0b1724) will decrease coverage by 69.12%. The diff coverage is 0.00%.

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@@            Coverage Diff             @@
##           master    #941       +/-   ##
==========================================
- Coverage   77.47%   8.35%   -69.12%     
==========================================
  Files          26      26               
  Lines        3329    3267       -62     
==========================================
- Hits         2579     273     -2306     
- Misses        750    2994     +2244     

Files Changed	Coverage Δ
src/build_function.jl	0.00% <0.00%> (-72.27%)	:arrow_down:

... and 24 files with indirect coverage changes

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[YingboMa]

@shashi do you know what happened to Groebner Bases Test?