feat: [+] #66 math functions

[eruizalo]

Description

New math functions and testing methods

Related Issue

resolves #66

How Has This Been Tested?

• This pull request contains appropriate tests?: YES

[alfonsorr]

[codecov]

Codecov Report

Merging #223 (7b3087f) into main (e9e0f6c) will increase coverage by 0.24%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #223      +/-   ##
==========================================
+ Coverage   96.64%   96.88%   +0.24%     
==========================================
  Files          54       58       +4     
  Lines         952     1026      +74     
  Branches       14       14              
==========================================
+ Hits          920      994      +74     
  Misses         32       32              

Flag	Coverage Δ
spark-2.4.x	93.47% <100.00%> (+0.46%)	⬆️
spark-3.0.x	96.09% <100.00%> (+0.27%)	⬆️
spark-3.1.x	96.99% <100.00%> (+0.21%)	⬆️
spark-3.2.x	96.99% <100.00%> (+0.21%)	⬆️
spark-3.3.x	96.99% <100.00%> (+0.21%)	⬆️

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Impacted Files	Coverage Δ
...ore/src/main/scala/doric/syntax/IntegralType.scala	100.00% <100.00%> (ø)
.../main/scala/doric/syntax/NumWithDecimalsType.scala	100.00% <100.00%> (ø)
...e/src/main/scala/doric/syntax/NumericColumns.scala	100.00% <100.00%> (ø)
...re/src/main/scala/doric/syntax/StringColumns.scala	100.00% <100.00%> (ø)
....0_3.1/scala/doric/syntax/NumericColumns2_31.scala	100.00% <100.00%> (ø)
..._3.2_3.3/scala/doric/syntax/NumericColumns31.scala	100.00% <100.00%> (ø)
..._3.2_3.3/scala/doric/syntax/NumericColumns32.scala	100.00% <100.00%> (ø)

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