Merge pull request #89 from scala-steward/update/cats-core-2.1.0

Update cats-core to 2.1.0

Author: ChristopherDavenport

Diff for: build.sbt

@@ -3,7 +3,7 @@ import sbtcrossproject.CrossPlugin.autoImport.{crossProject, CrossType}
 val scala213V = "2.13.1"
 val scala212V = "2.12.10"
 
-val catsV = "2.0.0"
+val catsV = "2.1.0"
 val catsEffectV = "2.1.1"
 val scalaTestV = "3.2.0-M2"