set version for dependencies

[mcarmonaa]

• versions are set to allow minor changes following semantic version, (in the end the specific versions are in glide.lock)
• since bblfsh/sdk and srcd.works/go-errors.v0 don't have releases yet, their versions have been set to the current last commit

It passes the tests with this versions.

[mcarmonaa]

Since I can't assign reviewrs I mention to the maintainer: @abeaumont

[codecov]

Codecov Report

Merging #9 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master      #9   +/-   ##
======================================
  Coverage    84.5%   84.5%           
======================================
  Files           4       4           
  Lines         200     200           
======================================
  Hits          169     169           
  Misses         30      30           
  Partials        1       1

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[mcarmonaa]

Since I can't assign reviewers, I mention the maintainer: @abeaumont