Update sbt-tpolecat to 0.3.1 (#110)

Author: scala-steward

project/plugins.sbt

@@ -4,7 +4,7 @@ addSbtPlugin("ch.epfl.scala" % "sbt-scalajs-bundler" % "0.20.0")
 
 addSbtPlugin("org.scalablytyped.converter" % "sbt-converter" % "1.0.0-beta37")
 
-addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.3.0")
+addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.3.1")
 addSbtPlugin("org.scalameta"             % "sbt-scalafmt" % "2.4.6")
 
 libraryDependencies ++= Seq("com.lihaoyi" %% "upickle" % "1.6.0")