Update scala 3 version, drop support for scala 2

.github/workflows/scala.yml

@@ -7,34 +7,6 @@ on:
     branches: [ master ]
 
 jobs:
-  scala_2_12:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Set up JDK
-      uses: actions/setup-java@v3
-      with:
-        java-version: 11
-        distribution: 'adopt'
-    - name: Run tests
-      run: sbt ++2.12.18 test
-
-  scala_2_13:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Set up JDK
-      uses: actions/setup-java@v3
-      with:
-        java-version: 11
-        distribution: 'adopt'
-    - name: Run tests
-      run: sbt ++2.13.12 test
-
   scala_3:
 
     runs-on: ubuntu-latest
@@ -47,4 +19,4 @@ jobs:
           java-version: 11
           distribution: 'adopt'
       - name: Run tests
-        run: sbt ++3.3.0 test
+        run: sbt ++3.4.2 test

README.md

@@ -116,6 +116,10 @@ class JavaClassExtended extends JavaClass
 val mm = mock[JavaClassExtended] // should be used instead
 ```
 
+3.
+* Mockito makes use of Symbol.newClass which is marked as experimental; to avoid having to add the `@experimental`
+  attribute everywhere in tests, you can add the `Test / scalacOptions += "-experimental"` to your build. Note
+  that this option is only available in scala 3.4.0+
 
 
 ## Documentation

build.sbt

@@ -4,17 +4,12 @@ lazy val scalatest = Def.setting("org.scalatest" %%% "scalatest" % "3.2.19")
 lazy val specs2 = Def.setting("org.specs2" %%% "specs2-core" % "4.20.8")
 
 val commonSettings = Defaults.coreDefaultSettings ++ Seq(
-  /**
-   *  Symbol.newClass is marked experimental, so we should use @experimental annotation in every test suite.
-   *  3.3.0 has a bug so we can omit this annotation
-   */
-  scalaVersion := "3.3.0",
-  scalacOptions ++= Seq("-deprecation", "-unchecked", "-feature", "-release:8")
+  scalaVersion := "3.4.2",
+  scalacOptions ++= Seq("-deprecation", "-unchecked", "-feature", "-release:8", "-experimental")
 )
 
 lazy val scalamock = crossProject(JSPlatform, JVMPlatform) in file(".") settings(
     commonSettings,
-    crossScalaSettings,
     name := "scalamock",
     Compile / packageBin / publishArtifact := true,
     Compile / packageDoc / publishArtifact := true,
@@ -30,36 +25,10 @@ lazy val scalamock = crossProject(JSPlatform, JVMPlatform) in file(".") settings
 
 lazy val examples = project in file("examples") settings(
   commonSettings,
-  crossScalaSettings,
   name := "ScalaMock Examples",
   publish / skip := true,
   libraryDependencies ++= Seq(
     scalatest.value % Test,
     specs2.value % Test
   )
 ) dependsOn scalamock.jvm
-
-def crossScalaSettings = {
-  def addDirsByScalaVersion(path: String): Def.Initialize[Seq[sbt.File]] =
-    scalaVersion.zip(baseDirectory) { case (v, base) =>
-      CrossVersion.partialVersion(v) match {
-        case Some((v, _)) if Set(2L, 3L).contains(v) =>
-          Seq(base / path / s"scala-$v")
-        case _ =>
-          Seq.empty
-      }
-    }
-  Seq(
-    crossScalaVersions := Seq("2.12.20", "2.13.14", scalaVersion.value),
-    Compile / unmanagedSourceDirectories ++= addDirsByScalaVersion("src/main").value,
-    Test / unmanagedSourceDirectories ++= addDirsByScalaVersion("src/test").value,
-    libraryDependencies ++= {
-      CrossVersion.partialVersion(scalaVersion.value) match {
-        case Some((2, _)) =>
-          Seq("org.scala-lang" % "scala-reflect" % scalaVersion.value)
-        case _ =>
-          Seq.empty
-      }
-    }
-  )
-}