Create CRC-16.go

[dev-priyanshu15]

add hacktoberfest label

[raklaptudirm]

Put the tests in the same pull request.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.

Project coverage is 87.18%. Comparing base (822634f) to head (44b2e69).
Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
checksum/CRC-16.go	0.00%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #754      +/-   ##
==========================================
- Coverage   87.68%   87.18%   -0.50%     
==========================================
  Files         209      210       +1     
  Lines        5547     6963    +1416     
==========================================
+ Hits         4864     6071    +1207     
- Misses        542      751     +209     
  Partials      141      141              

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