Port plugin to sbt {1.0.x, 0.13.16}

[suhasgaddam]

This requires coordination with 47degrees/sbt-org-policies#510 and 47degrees/sbt-microsites#221.

[suhasgaddam]

Thinking more about the eventual publishMicrosite, it should only happen one of the sbt builds.
And also bumping version.sbt/whatever commits travis does after a merge to master.

[fedefernandez]

Yes, I agree. We could use a similar approach like the one we've used with the different Scala versions:
https://github.com/47deg/sbt-org-policies/blob/master/core/src/main/scala/sbtorgpolicies/runnable/model.scala#L25

[fedefernandez]

Looks good to me

[fedefernandez]

Yes, I agree. We could use a similar approach like the one we've used with the different Scala versions:
https://github.com/47deg/sbt-org-policies/blob/master/core/src/main/scala/sbtorgpolicies/runnable/model.scala#L25

[suhasgaddam]

@fedefernandez can you give this another check? a023e1e

I need to run orgUpdateDocFiles and depUpdateDependencyIssues, but they need to be guarded so they only run for 1 sbt version.

release currently publishes for both sbt versions.

I also bumped to 0.2.0-SNAPSHOT similar to how sbt-org-policies had the minor version bumped.

[fedefernandez]

New changes looks good to me 👍 thanks