Upgrade to sbt-mima-plugin 0.1.18.
Upgrade to sbt-mima-plugin 0.1.18.

This is the latest version. The first version supporting sbt 1.0
was 0.1.15, but the three later versions seem to contain fixes for
major binary compatibility issues (ironically).

SebsLittleHelpers/scala-js,SebsLittleHelpers/scala-js,gzm0/scala-js,nicolasstucki/scala-js,scala-js/scala-js,scala-js/scala-js,scala-js/scala-js,gzm0/scala-js,nicolasstucki/scala-js,sjrd/scala-js,sjrd/scala-js,sjrd/scala-js