Merge pull request #136 from http4s/update/series/0.23/munit-cats-effect-2.0.0-M4

Update munit-cats-effect to 2.0.0-M4 in series/0.23

Author: rossabaker

build.sbt

@@ -17,7 +17,7 @@ val scalacheckXmlVersion = "0.1.0"
 val scalaXml1Version = "1.3.1"
 val scalaXml2Version = "2.2.0"
 val munitVersion = "1.0.0-M11"
-val munitCatsEffectVersion = "2.0.0-M3"
+val munitCatsEffectVersion = "2.0.0-M4"
 
 lazy val scalaXml2 = project
   .in(file("scala-xml-2"))