Implement, test and fuzz SHA1

[mborland]

Closes: #10

[cppalliance-bot]

An automated preview of the documentation is available at https://13.crypt.prtest2.cppalliance.org/libs/crypt/doc/html/index.html

[cppalliance-bot]

An automated preview of the documentation is available at https://13.crypt.prtest2.cppalliance.org/libs/crypt/doc/html/index.html

[cppalliance-bot]

An automated preview of the documentation is available at https://13.crypt.prtest2.cppalliance.org/libs/crypt/doc/html/index.html

[cppalliance-bot]

An automated preview of the documentation is available at https://13.crypt.prtest2.cppalliance.org/libs/crypt/doc/html/index.html

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (5e3a728) to head (90c6da8).
Report is 36 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##           develop       #13    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files            8        10     +2     
  Lines          310       730   +420     
  Branches        46        92    +46     
==========================================
+ Hits           310       730   +420     

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[cppalliance-bot]

An automated preview of the documentation is available at https://13.crypt.prtest2.cppalliance.org/libs/crypt/doc/html/index.html

[cppalliance-bot]

An automated preview of the documentation is available at https://13.crypt.prtest2.cppalliance.org/libs/crypt/doc/html/index.html

[cppalliance-bot]

An automated preview of the documentation is available at https://13.crypt.prtest2.cppalliance.org/libs/crypt/doc/html/index.html