Updated characters in leet speak transformer

[rion18]

Type of change:

• Refactor
• Performance improvement
• New feature
• Bug fix
• Other (please describe): Functionality improvement

Please describe the changes this PR makes and why it should be merged:
This MR updates some characters in the leet speak transformer, so it can detect profanities such as 5h1t, 5h!t, 0r645m and more.

Status:

• I've added/modified unit tests relevant to my change / not needed
• This PR contains breaking changes
• This PR doesn't include changes to the code

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (36b6512) to head (fd19424).
Report is 29 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #76   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           27        26    -1     
  Lines          505       467   -38     
  Branches        92        80   -12     
=========================================
- Hits           505       467   -38     

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[jo3-l]

Thanks for the PR. Would you mind rebasing and changing the target branch to dev instead of main? (Sorry this isn't made clear in the contribution guidelines.) If not, I'm happy to do it for you when I merge this change. FYI, I'm busy for the next month or so and a more thorough review and release will likely be delayed. You can of course use this updated transformer in your own code with the current version.

[rion18]

Closed in favor of #78