fix: fix comparison involving `NaN`#178

blegat merged 2 commits intoJuliaAlgebra:masterJuliaAlgebra/DynamicPolynomials.jl:masterfrom

AayushSabharwal:as/fix-isequalAayushSabharwal/DynamicPolynomials.jl:as/fix-isequalCopy head branch name to clipboard