Add toPartiallyContain

[idan-at]

What

Closes #374

Notes

Housekeeping

• Unit tests
• Documentation is up to date
• No additional lint warnings
• Typescript definitions are added/updated where relevant

[codecov]

Codecov Report

Merging #376 (ccf72b2) into main (9ffe2af) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #376   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          135       137    +2     
  Lines          833       843   +10     
  Branches       144       145    +1     
=========================================
+ Hits           833       843   +10     

Impacted Files	Coverage Δ
src/matchers/toPartiallyContain/index.js	100.00% <100.00%> (ø)
src/matchers/toPartiallyContain/predicate.js	100.00% <100.00%> (ø)

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[SimenB]

thanks!