Update acyclic to 0.3.15 (#3779)

Pull request: #3779

Author: lefou

build.mill

@@ -116,7 +116,7 @@ object Deps {
   val play =
     Seq(Play_3_0, Play_2_9, Play_2_8, Play_2_7, Play_2_6).map(p => (p.playBinVersion, p)).toMap
 
-  val acyclic = ivy"com.lihaoyi:::acyclic:0.3.12"
+  val acyclic = ivy"com.lihaoyi:::acyclic:0.3.15"
   val ammoniteVersion = "3.0.0-2-6342755f"
   val asmTree = ivy"org.ow2.asm:asm-tree:9.7.1"
   val bloopConfig = ivy"ch.epfl.scala::bloop-config:1.5.5"