Update cats-core to 2.13.0 (NomadBlacky#347)

Author: scala-steward

build.sbt

@@ -103,7 +103,7 @@ lazy val legacy = (project in file("legacy"))
       "org.scalaz"           %% "scalaz-core"            % "7.3.8",
       "com.typesafe.akka"    %% "akka-http-core"         % "10.2.10",
       "com.typesafe.akka"    %% "akka-stream"            % "2.6.20",
-      "org.typelevel"        %% "cats-core"              % "2.12.0",
+      "org.typelevel"        %% "cats-core"              % "2.13.0",
       "com.lihaoyi"          %% "ammonite-ops"           % "2.4.1",
       "com.typesafe.play"    %% "play-ahc-ws-standalone" % "2.1.11",
       "org.scalikejdbc"      %% "scalikejdbc"            % versions.scalikejdbc,