Merge pull request #738 from typelevel/update/sbt-scalafmt-2.5.5

Update sbt-scalafmt to 2.5.5

Author: mergify[bot]

project/plugins.sbt

@@ -5,4 +5,4 @@ addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.3.2")
 addSbtPlugin("com.thoughtworks.sbt-api-mappings" % "sbt-api-mappings" % "3.0.2")
 addSbtPlugin("org.typelevel" % "sbt-typelevel-ci-release" % "0.8.0")
 addSbtPlugin("org.typelevel" % "sbt-typelevel-mergify" % "0.8.0")
-addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.4")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.5.5")