Merge pull request #64 from scala-steward/update/http4s-blaze-client-0.21.0-RC2

Update http4s-blaze-client, http4s-circe, ... to 0.21.0-RC2

Author: ChristopherDavenport

build.sbt

@@ -1,11 +1,11 @@
 import sbtcrossproject.CrossPlugin.autoImport.{crossProject, CrossType}
 
 
-val catsV = "2.0.0"
+val catsV = "2.1.0"
 val catsEffectV = "2.0.0"
 val fs2V = "2.2.1"
-val http4sV = "0.21.0-M6"
-val circeV = "0.12.3"
+val http4sV = "0.21.0-RC2"
+val circeV = "0.13.0-RC1"
 val catsEffectTestingV = "0.3.0"
 val log4catsV = "1.0.1"
 val logbackClassicV = "1.2.3"