Update com.typesafe.sbt:sbt-gzip

[ljdelight]

There is a very old artifact being used and it needs to be updated. The build failed, and while it works for now, it's not great to use such old artifacts!

In file project/plugins.sbt, this line is importing sbt-gzip: addSbtPlugin("com.typesafe.sbt" % "sbt-gzip" % "1.0.2"). At the moment the sbt-gzip artifact is back online and the builds are successful, but we should update to avoid issues. It looks like the project owners are moving this one to https://github.com/sbt/sbt-gzip#sbt-gzip.

The build error:

 Error:  (update) sbt.librarymanagement.ResolveException: Error downloading com.typesafe.sbt:sbt-gzip;sbtVersion=1.0;scalaVersion=2.12:1.0.2
Error:    Not found
Error:    Not found
Error:    not found: https://repo1.maven.org/maven2/com/typesafe/sbt/sbt-gzip_2.12_1.0/1.0.2/sbt-gzip-1.0.2.pom
Error:    not found: /home/runner/.ivy2/localcom.typesafe.sbt/sbt-gzip/scala_2.12/sbt_1.0/1.0.2/ivys/ivy.xml
Error:    download error: Caught java.io.IOException (Server returned HTTP response code: 504 for URL: https://scala.jfrog.io/artifactory/sbt-plugin-releases/com.typesafe.sbt/sbt-gzip/scala_2.12/sbt_1.0/1.0.2/ivys/ivy.xml) while downloading https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/com.typesafe.sbt/sbt-gzip/scala_2.12/sbt_1.0/1.0.2/ivys/ivy.xml
Error:    not found: https://repo.typesafe.com/typesafe/ivy-releases/com.typesafe.sbt/sbt-gzip/scala_2.12/sbt_1.0/1.0.2/ivys/ivy.xml