feat: minor code refactor

[jamesgeorge007]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

use includes() to check for existence

Breaking Changes

N/A

Additional Info

N/A

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@c546871). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master     #399   +/-   ##
=========================================
  Coverage          ?   94.88%           
=========================================
  Files             ?        9           
  Lines             ?      293           
  Branches          ?       78           
=========================================
  Hits              ?      278           
  Misses            ?       14           
  Partials          ?        1

Impacted Files	Coverage Δ
src/preProcessPattern.js	97.59% <100%> (ø)

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[alexander-akait]

Thanks!