Modified symbolRegex in isStrongPassword to include '\'

[nandavikas]

isStrongPassword - Bug fix

I modified the special character regex a little bit to add validation for '\' character. I worked on this based on an issue in the repository

Checklist

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

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (b958bd7) 99.95% compared to head (8c06778) 99.95%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2278   +/-   ##
=======================================
  Coverage   99.95%   99.95%           
=======================================
  Files         107      107           
  Lines        2454     2454           
  Branches      619      619           
=======================================
  Hits         2453     2453           
  Partials        1        1           

Files Changed	Coverage Δ
src/lib/isStrongPassword.js	100.00% <100.00%> (ø)

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[WikiRik]

Thanks for the PR! Don't forget to add additional tests before we can review this

[manojmula]

Tests are working and changes are legit.