migrate to go.mod

[eternal-flame-AD]

This PR migrated dependency management system from dep to go.mod

[jmattheis]

The swagger spec generation sadly doesn't support go modules. We have to workaround this problem.

In the Makefile execute the swagger executable without go modules:

update-swagger:
	GO111MODULE=off swagger generate spec --scan-models -o docs/spec.json

After this the swagger executable will still not find the dependencies because they aren't on the gopath. So we somehow need to get the go mod dependencies there. The easiest solution I've found so far is to fill the vendor folder. So executing go mod vendor inside .travis.yml(install step) should work.

[eternal-flame-AD]

Yeah, I think it would be good to write both commands in Makefile

[codecov]

Codecov Report

Merging #111 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #111   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          26     26           
  Lines         806    806           
=====================================
  Hits          806    806

---

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 19811da...eba1858. Read the comment docs.

[jmattheis]

👍