Update sbt-tpolecat to 0.1.20

Author: 47erbot

project/plugins.sbt

@@ -10,4 +10,4 @@ addSbtPlugin("com.alejandrohdezma"       % "sbt-github"               % "0.9.2")
 addSbtPlugin("com.alejandrohdezma"       % "sbt-github-header"        % "0.9.2")
 addSbtPlugin("com.alejandrohdezma"       % "sbt-github-mdoc"          % "0.9.2")
 addSbtPlugin("com.alejandrohdezma"       % "sbt-remove-test-from-pom" % "0.1.0")
-addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat"             % "0.1.19")
+addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat"             % "0.1.20")