Add GORM as a store implements

[techknowlogick]

More info about GORM: http://gorm.io/

[codecov-io]

Codecov Report

Merging #85 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #85   +/-   ##
=======================================
  Coverage   53.57%   53.57%           
=======================================
  Files          11       11           
  Lines         868      868           
=======================================
  Hits          465      465           
  Misses        302      302           
  Partials      101      101

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