added toCamelCase method

[muhammadharis4]

added a function named toCamelCase, which converts a string to camel case and uses spaces, hyphens, and underscores to separate words to make it one camel case work.

Checklist

• [ X ] PR contains only changes related; no stray files, etc.
• [ X ] README updated (where applicable)
• Tests written (where applicable)
• References provided in PR (where applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.95%. Comparing base (b958bd7) to head (00f981c).
Report is 40 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2324   +/-   ##
=======================================
  Coverage   99.95%   99.95%           
=======================================
  Files         107      108    +1     
  Lines        2454     2458    +4     
  Branches      619      620    +1     
=======================================
+ Hits         2453     2457    +4     
  Partials        1        1           

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