build: cross-publish plugin for sbt 1 and sbt 2

Publish plugin against both
sbt 1.x (Scala 2.12) and sbt 2.x (Scala 3)
- crossScalaVersions := Seq(2.12.20, 3.8.4)
- sbt 2.x target: 2.0.0-RC12 -> 2.0.0-RC15
- Scala 3: 3.7.2 -> 3.8.4
- build sbt: 1.12.10 -> 1.12.11

Author: reynaldjoabet

build.sbt

@@ -8,7 +8,7 @@ specifications as part of your build. Other tasks are available as command line
 """
 
 lazy val scala21220 = "2.12.20"
-lazy val scala372 = "3.7.2"
+lazy val scala384 = "3.8.4"
 
 onLoadMessage := s"Welcome to sbt-openapi-generator ${version.value}"
 //crossScalaVersions := Nil
@@ -38,8 +38,8 @@ lazy val `sbt-openapi-generator` = (project in file("."))
       )
     ),
     moduleName := "sbt-openapi-generator",
-    crossScalaVersions := Seq(scala21220),
-    // crossScalaVersions := Seq(scala21220, scala372),
+    //crossScalaVersions := Seq(scala21220),
+    crossScalaVersions := Seq(scala21220, scala384),
     sbtPlugin := true,
     scalacOptions ++= {
       scalaBinaryVersion.value match {
@@ -50,7 +50,7 @@ lazy val `sbt-openapi-generator` = (project in file("."))
     (pluginCrossBuild / sbtVersion) := {
       scalaBinaryVersion.value match {
         case "2.12" => "1.12.10"
-        case _      => "2.0.0-RC12"
+        case _      => "2.0.0-RC15"
       }
     },
     scriptedLaunchOpts := {

project/build.properties

@@ -1 +1 @@
-sbt.version=1.12.10
+sbt.version=1.12.11