Improve selection utilites

[maier49]

Type: feature

The following has been addressed in the PR:

• There is a related issue
• All code matches the style guide
• Unit or Functional tests are included in the PR

Description:
Adds replaceChildByKey, replaceChildPropertiesByKey, and assignChildPropertyByKey functions to support/d.ts. This also refactors some of the logic in support/d.ts to reuse the same logic for finding nodes in multiple places.
Resolves #9, #28

[codecov]

Codecov Report

Merging #82 into master will increase coverage by 0.52%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #82      +/-   ##
==========================================
+ Coverage    98.5%   99.02%   +0.52%     
==========================================
  Files           9        9              
  Lines         601      618      +17     
  Branches      164      173       +9     
==========================================
+ Hits          592      612      +20     
+ Misses          1        0       -1     
+ Partials        8        6       -2

Impacted Files	Coverage Δ
src/support/d.ts	100% <100%> (+4.54%)	⬆️

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[kitsonk]

README Updates?

[kitsonk]

Awesome! Thank you.