Go modules support for 1.12

[azihsoyn]

This PR adds support for running this tool against Go modules.

Closes #234

[azihsoyn]

I'll fix CI using build tag for old version compatibility.

Thanks.

[gcmurphy]

👍 🎉 💯

@azihsoyn first of all. Thank you SO MUCH! for taking the time to submit this PR. It has been the most requested feature, and something I've not had the time to get around to. At a first glance this seems really great.

My only asks would be:

1. Can you clarify what this change would mean for Go version support? I'm happy to move with the latest but we will need to update docs / CI jobs accordingly.

2. Can you please replace the commented out tests to use Skip() in the body instead? I'd like to keep that showing in test output if possible as a reminder to revisit / re-evaluate them.

@ccojocar do you have any additional feedback on this?

[azihsoyn]

Hi, @gcmurphy! Thanks for the review!

I'll fix your pointed places ASAP😄

[ccojocar]

Great work! It would be great if we could fix a few things to get the tests passing. I believe we can retrieve the parsing error from the package.

[azihsoyn]

Hi, @gcmurphy, @ccojocar!

I fixed for all test passes.

But packages library may not be supported for 1.10 or older.

Can I remove test config from .travis.yml ?

[ccojocar]

Thanks @azihsoyn! It looks great!

Can I remove test config from .travis.yml ?

Yes, Let's remove the 1.9 and 1.10 from travis config. I think that we will bump the version to 2.0.0 on the next release to make it clear that is a breaking change.

[codecov-io]

Codecov Report

Merging #297 into master will not change coverage.
The diff coverage is 88.23%.

@@          Coverage Diff           @@
##           master    #297   +/-   ##
======================================
  Coverage    56.3%   56.3%           
======================================
  Files           9       9           
  Lines         492     492           
======================================
  Hits          277     277           
  Misses        188     188           
  Partials       27      27

Impacted Files	Coverage Δ
analyzer.go	82.4% <88.23%> (ø)	⬆️

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[ccojocar]

@gcmurphy Please could you have a look over this PR? I'm waiting for your thumb up before merging it. Thanks

[azihsoyn]

Thanks for review and merging!