Simplify Version command

[itsksaurabh]

closes #122

[codecov]

Codecov Report

Merging #123 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #123   +/-   ##
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  Coverage   42.72%   42.72%           
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  Files           8        8           
  Lines         316      316           
=======================================
  Hits          135      135           
  Misses        174      174           
  Partials        7        7           

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[boekkooi-fresh]

👍 This replace the version command with the --version flags.
Because of the removal of the version command this is actually a BC break so let's include this in 0.3.0.

[itsksaurabh]

@boekkooi-fresh I am glad that you liked it. Awaiting merge. 😇

[vgarvardt]

@itsksaurabh thank you for the contribution!

ldflags should be fixed as well, as version is injected in the compile-time https://github.com/hellofresh/klepto/blob/master/.goreleaser.yml#L13

[itsksaurabh]

@vgarvardt I am glad that you liked it.

The version variable is already in the same cmd package just shifted to root.go in the same package.

So, I think it is not needed to change ldflags here.

Please let me know if I am missing something :)

[vgarvardt]

@itsksaurabh true this, sorry