Handle javaconverters deprecation difference between 2.12 and 13

build.sbt

@@ -16,6 +16,14 @@ mimaPreviousArtifacts := {
   versions.filter(versionFilter).map("io.circe" %% "circe-config" % _)
 }
 
+unmanagedSourceDirectories in Compile += {
+  val sourceDir = (sourceDirectory in Compile).value
+  CrossVersion.partialVersion(scalaVersion.value) match {
+    case Some((2, n)) if n <= 12 => sourceDir / "scala-2.13-"
+    case _                       => sourceDir / "scala-2.13+"
+  }
+}
+
 enablePlugins(GitPlugin)
 versionWithGit
 git.useGitDescribe := true

src/main/scala-2.13+/main/scala/io.circe.config/compat/package.scala

@@ -0,0 +1,6 @@
+package io.circe.config
+
+// Probably not needed after https://github.com/scala/scala-collection-compat/pull/217
+package object compat {
+  val converters = scala.jdk.CollectionConverters
+}

src/main/scala-2.13-/main/scala/io.circe.config/compat/package.scala

@@ -0,0 +1,7 @@
+package io.circe.config
+
+
+// Probably not needed after https://github.com/scala/scala-collection-compat/pull/217
+package object compat {
+  val converters = scala.collection.JavaConverters
+}

src/main/scala/io.circe.config/package.scala

@@ -16,7 +16,7 @@
 package io.circe
 
 import com.typesafe.config._
-import scala.collection.JavaConverters._
+import config.compat.converters._
 
 /**
  * circe-config: A [[https://github.com/lightbend/config Typesafe config]]

src/main/scala/io.circe.config/parser.scala

@@ -23,7 +23,7 @@ import cats.syntax.bifunctor._
 import cats.instances.either._
 import java.io.File
 
-import scala.collection.JavaConverters._
+import compat.converters._
 import com.typesafe.config._
 
 /**