Fixed panic in division using nulls.

[jorgecarleitao]

Close #437

There may be other more efficient implementations, but for now having the bug fixed is more important :)

[ritchie46]

Maybe we could keep the old implementation as fast path in case both arrays don't have null values.

[codecov]

Codecov Report

Merging #438 (fe81b96) into main (cdbc958) will decrease coverage by 0.02%.
The diff coverage is 22.22%.

@@            Coverage Diff             @@
##             main     #438      +/-   ##
==========================================
- Coverage   80.80%   80.77%   -0.03%     
==========================================
  Files         372      372              
  Lines       22629    22637       +8     
==========================================
  Hits        18286    18286              
- Misses       4343     4351       +8     

Impacted Files	Coverage Δ
src/compute/arithmetics/basic/div.rs	81.66% <22.22%> (-10.65%)	⬇️
src/types/mod.rs	28.31% <0.00%> (-0.89%)	⬇️

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[Dandandan]

Maybe we could keep the old implementation as fast path in case both arrays don't have null values.

Great idea. Only needs no nulls on the right side I think (as the panic is for division by zero).