Update sbt-scalafix to 0.10.4

Author: scala-steward

project/plugins.sbt

@@ -1,7 +1,7 @@
 addSbtPlugin("com.github.sbt"      % "sbt-native-packager"    % "1.9.9")
 addSbtPlugin("org.scalameta"       % "sbt-scalafmt"           % "2.4.6")
 addSbtPlugin("com.beautiful-scala" % "sbt-scalastyle"         % "1.5.1")
-addSbtPlugin("ch.epfl.scala"       % "sbt-scalafix"           % "0.9.34")
+addSbtPlugin("ch.epfl.scala"       % "sbt-scalafix"           % "0.10.4")
 addSbtPlugin("org.jmotor.sbt"      % "sbt-dependency-updates" % "1.2.2")
 addSbtPlugin("com.github.sbt"      % "sbt-ci-release"         % "1.5.10")
 addSbtPlugin("net.virtual-void"    % "sbt-dependency-graph"   % "0.10.0-RC1")