Use non-strictly-previous releases in site plugin

Author: armanbilge

kernel/src/main/scala/org/typelevel/sbt/kernel/GitHelper.scala

@@ -27,11 +27,12 @@ private[sbt] object GitHelper {
    * @param fromHead
    *   if `true`, only tags reachable from HEAD's history. If `false`, all tags in the repo.
    */
-  def previousReleases(fromHead: Boolean = false): List[V] =
+  def previousReleases(fromHead: Boolean = false, strict: Boolean = true): List[V] =
     Try {
       val merged = if (fromHead) " --merged HEAD" else ""
       // --no-contains omits tags on HEAD
-      s"git -c versionsort.suffix=- tag --no-contains HEAD$merged --sort=-v:refname" // reverse
+      val noContains = if (strict) " --no-contains HEAD" else ""
+      s"git -c versionsort.suffix=- tag$noContains$merged --sort=-v:refname" // reverse
         .!!
         .split("\n")
         .toList

site/src/main/scala/org/typelevel/sbt/TypelevelSitePlugin.scala

@@ -253,7 +253,7 @@ object TypelevelSitePlugin extends AutoPlugin {
     // and there are no stable releases it is bincompatible with,
     // then for all effective purposes it is the current release
 
-    val release = GitHelper.previousReleases(fromHead = true) match {
+    val release = GitHelper.previousReleases(fromHead = true, strict = false) match {
       case head :: tail if head.isPrerelease =>
         tail
           .filterNot(_.isPrerelease)
@@ -267,7 +267,7 @@ object TypelevelSitePlugin extends AutoPlugin {
 
   // latest tagged release, including pre-releases
   private lazy val currentPreRelease = Def.setting {
-    GitHelper.previousReleases(fromHead = true).headOption.map(_.toString)
+    GitHelper.previousReleases(fromHead = true, strict = false).headOption.map(_.toString)
   }
 
   private def previewTask = Def