Migrate from deprecated in syntax to slash syntax

macros/build.sbt

@@ -14,20 +14,21 @@ libraryDependencies ++= {
         "org.scala-lang" % "scala-reflect" % s"${scalaVersion.value}",
         "org.typelevel" %% "spire" % "0.18.0"
       )
-    case Some((3, _)) => Seq(
-    )
+    case Some((3, _)) =>
+      Seq(
+        )
     case _ => ???
   }
 }
-unmanagedSourceDirectories in Compile += {
+Compile / unmanagedSourceDirectories += {
   CrossVersion.partialVersion(scalaVersion.value) match {
     case Some((2, _)) => baseDirectory.value / "src" / "main" / "scala_2"
     case Some((3, _)) => baseDirectory.value / "src" / "main" / "scala_3"
     case _ => ???
   }
 }
 
-unmanagedSourceDirectories in Test += {
+Test / unmanagedSourceDirectories += {
   CrossVersion.partialVersion(scalaVersion.value) match {
     case Some((2, _)) => baseDirectory.value / "src" / "test" / "scala_2"
     case Some((3, _)) => baseDirectory.value / "src" / "test" / "scala_3"

math/build.sbt

@@ -29,7 +29,7 @@ libraryDependencies += {
 }
 
 // see https://github.com/typesafehub/scalalogging/issues/23
-testOptions in Test += Tests.Setup(classLoader =>
+Test / testOptions += Tests.Setup(classLoader =>
   try {
     classLoader
       .loadClass("org.slf4j.LoggerFactory")
@@ -39,9 +39,6 @@ testOptions in Test += Tests.Setup(classLoader =>
     case _: Exception =>
 })
 
-fork in Test := true
+Test / fork := true
 
 javaOptions := Seq("-Xmx4g", "-Xss10m")
-
-
-

project/Build.scala

@@ -31,7 +31,7 @@ object Common {
       Resolver.sonatypeRepo("releases"),
       Resolver.typesafeRepo("releases")
     ),
-    testOptions in Test += Tests.Argument("-oDF"),
+    Test / testOptions += Tests.Argument("-oDF"),
 
     // test dependencies
     libraryDependencies ++= Seq(
@@ -63,7 +63,7 @@ object Common {
     },
 
     // stuff related to publishing
-    publishArtifact in Test := false,
+    Test / publishArtifact := false,
     pomIncludeRepository := { _ =>
       false
     },
@@ -73,7 +73,7 @@ object Common {
     publishTo := sonatypePublishTo.value,
     sonatypeProjectHosting := Some(GitHubHosting("scalanlp", "breeze", "David Hall", "[email protected]")),
 
-    unmanagedSourceDirectories in Compile ++= {
+    Compile / unmanagedSourceDirectories ++= {
       CrossVersion.partialVersion(scalaVersion.value) match {
         case Some((2, 11|12)) => Seq(
           baseDirectory.value / "src" / "main" / "scala_2.11_2.12",

version.sbt

@@ -6,7 +6,7 @@ git.baseVersion := "2.1.0"
 
 val VersionRegex = "v([0-9]+.[0-9]+.[0-9]+)-?(.*)?".r
 
-version in ThisBuild := "2.1.0"
+ThisBuild / version := "2.1.0"
 
 /*
 git.gitTagToVersionNumber := {