Declare versionScheme and add sbt-version-policy

Author: Philippus

build.sbt

@@ -2,14 +2,16 @@ lazy val root = project.in(file("."))
   .aggregate(parserCombinatorsJVM, parserCombinatorsJS, parserCombinatorsNative)
   .settings(
     publish / skip := true,
+    ThisBuild / versionScheme := Some("early-semver"),
+    ThisBuild / versionPolicyIntention := Compatibility.BinaryAndSourceCompatible
   )
 
 lazy val parserCombinators = crossProject(JVMPlatform, JSPlatform, NativePlatform)
   .in(file("."))
   .settings(
     ScalaModulePlugin.scalaModuleSettings,
     name := "scala-parser-combinators",
-    scalaModuleMimaPreviousVersion := None,  // until we publish 1.2.0
+    scalaModuleMimaPreviousVersion := Some("1.2.0-M2"),
 
     libraryDependencies += "junit" % "junit" % "4.13.2" % Test,
     libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % Test,

build.sh

@@ -53,4 +53,4 @@ export CI_SNAPSHOT_RELEASE="${projectPrefix}publish"
 # for now, until we're confident in the new release scripts, just close the staging repo.
 export CI_SONATYPE_RELEASE="; sonatypePrepare; sonatypeBundleUpload; sonatypeClose"
 
-sbt clean ${projectPrefix}test ${projectPrefix}publishLocal $releaseTask
+sbt clean ${projectPrefix}test ${projectPrefix}versionPolicyCheck ${projectPrefix}publishLocal $releaseTask

project/plugins.sbt

@@ -12,4 +12,5 @@ addSbtPlugin("org.scala-js" % "sbt-scalajs" % scalaJSVersion)
 addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.0.0")
 addSbtPlugin("org.scala-native" % "sbt-scala-native" % scalaNativeVersion)
 
+addSbtPlugin("ch.epfl.scala" % "sbt-version-policy" % "1.0.0-RC5")
 addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.5.3")