Improve normalized method

[Sprokof]

Hi, i improved email normalization by adding dots option, it's related to 171 issue

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.01%. Comparing base (7c380c8) to head (9ab59d4).
Report is 50 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #249      +/-   ##
============================================
+ Coverage     97.95%   98.01%   +0.05%     
- Complexity      361      370       +9     
============================================
  Files            13       13              
  Lines           636      655      +19     
  Branches        174      176       +2     
============================================
+ Hits            623      642      +19     
  Partials         13       13              

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