Update zerowaste to 0.2.21 (#402)

Author: scala-steward

project/Dependencies.scala

@@ -16,7 +16,7 @@ object Dependencies {
     val sbtTpolecat = "0.5.1"
     val sbtVersionPolicy = "3.2.1"
     val scaluzzi = "0.1.23"
-    val zerowaste = "0.2.20"
+    val zerowaste = "0.2.21"
 
   }
 

src/main/scala/com/github/sideeffffect/sbtdecentscala/Dependencies.scala

@@ -9,7 +9,7 @@ object Dependencies {
     val betterMonadicFor: String = "0.3.1"
     val kindProjector: String = "0.13.3"
     val scaluzzi: String = "0.1.23"
-    val zerowaste = "0.2.20"
+    val zerowaste = "0.2.21"
 
   }