Attach env vars from kube config when renewing token

[cscetbon]

Solves #207

[andresmgot]

Thanks for the PR @cscetbon ! I have a minor comment. Also, can you bump the package version so this will be automatically released once merged?

[cscetbon]

Thanks for the PR @cscetbon ! I have a minor comment. Also, can you bump the package version so this will be automatically released once merged?

@andresmgot done, see my last commits. It seems there are issues in your travis scripts

[andresmgot]

Thanks for the changes! A bit difficult to spot, but your changes have some lint errors:

/home/travis/build/serverless/serverless-kubeless/lib/helpers.js
  132:48  error  Strings must use singlequote    quotes
  132:50  error  Missing semicolon               semi
  137:35  error  A space is required after '{'   object-curly-spacing
  137:48  error  A space is required before '}'  object-curly-spacing

Once that's fixed we can land this

[cscetbon]

@andresmgot I fixed those errors. Not sure what Travis complains about.

[andresmgot]

Seems just a transient error with xip.io. This is fine now, thanks!