Migrate dependency manager from glide to dep. Fixes #11

[kishaningithub]

My blog on how the migration was done
https://kishaningithub.github.io/blog/migrating-from-glide-to-dep/

[codecov-io]

Codecov Report

Merging #12 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master     #12   +/-   ##
======================================
  Coverage    71.5%   71.5%           
======================================
  Files           7       7           
  Lines         193     193           
======================================
  Hits          138     138           
  Misses         54      54           
  Partials        1       1

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