Add support goreleaser in travis

[mattiabertorello]

I follow this guidelines to create the gorealeaser.yml file and the deploy task on travis
https://goreleaser.com/ci/

[codecov]

Codecov Report

Merging #120 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #120   +/-   ##
=======================================
  Coverage   50.38%   50.38%           
=======================================
  Files          92       92           
  Lines        4118     4118           
=======================================
  Hits         2075     2075           
  Misses       1782     1782           
  Partials      261      261

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 414a52d...30b988a. Read the comment docs.

[endorama]

Looking at #270 and #275, should we go on with this?

Using goreleaser would allow us to create both snap and Homebrew formula in one go!

[masci]

Superseded by #311