Merge pull request #939 from fthomas/topic/add-sbt-scalafix

Add sbt-scalafix so that Scala Steward updates it in the code

Author: fthomas

build.sbt

@@ -79,7 +79,6 @@ lazy val core = myCrossProject("core")
       import cats.effect.ContextShift
       import cats.effect.IO
       import cats.effect.Timer
-      import org.http4s.client.blaze.BlazeClientBuilder
       import scala.concurrent.ExecutionContext
 
       implicit val ioContextShift: ContextShift[IO] = IO.contextShift(ExecutionContext.global)

project/plugins.sbt

@@ -11,3 +11,6 @@ addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.1.8")
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "0.6.1")
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.6.0")
 addSbtPlugin("org.wartremover" % "sbt-wartremover" % "2.4.2")
+
+// This is only here so that Scala Steward updates the version in sbt/package.scala too.
+addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.9.6")