Support sway 2.X.X

[idanw206]

The newer version of sway fixes issue #83 , and it would help me a lot if this will be supported.
Thanks!

[chrislukkk]

There is a PR #136 for that
@theganyo Anything needed on the PR to push this forward?

[idanw206]

I tried manually to change sway's version in the package.json and run swagger-node-runner's test.
Unfortunately it breaks some of them. I'm not sure I have time to dive into the code and figure out how to fix these test failures.

[idanw206]

Just opened a PR #139