fix: sanitize createRegExp return type

[didavid61202]

Fix

fix #160

Updates

1. Update createRegExp to type-Level function overloading, so the return type string is sanitized if the raw input argument is string type.
2. Update/Add relevant tests

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[what-the-diff]

• Added export to ExactEscapeChar
• Changed createRegExp type signature and implementation
• Sanitize string input in test/index.test.ts

[codecov-commenter]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (28a0cbe) compared to base (0b61f78).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #180   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          452       462   +10     
  Branches        81        81           
=========================================
+ Hits           452       462   +10     

Impacted Files	Coverage Δ
src/index.ts	100.00% <100.00%> (ø)

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Name	Status	Preview	Comments	Updated
magic-regexp	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Jan 29, 2023 at 10:25AM (UTC)

[danielroe]

Thank you! ❤️