Publish 1.14.2 artifact for ScalaJS 1.0.0-RC1

[ashawley]

This came up in #585 which was a PR to master, but there is no 1.15 release planned. Artifacts for 1.14.2 should be published in the meantime.

[ashawley]

I've pushed up 7e08d2f to the 1.14.x branch.

I'm looking at the release.sh script, and am realizing that it doesn't really support just publishing Scala.js artifacts, unfortunately.

[SethTisue]

note that Scala.js 1.0.0-RC2 has been published