clean up build.sbt, bring it in line with other modules

in particular, I've come to really dislike .withoutSuffixFor(JVMPlatform),
it makes the root project and the JVM project too easy to confuse with
each other

Author: SethTisue

build.sbt

@@ -1,12 +1,15 @@
-import sbtcrossproject.CrossPlugin.autoImport.crossProject
+lazy val root = project.in(file("."))
+  .aggregate(parserCombinatorsJVM, parserCombinatorsJS, parserCombinatorsNative)
+  .settings(
+    publish / skip := true,
+  )
 
 lazy val parserCombinators = crossProject(JVMPlatform, JSPlatform, NativePlatform)
-  .withoutSuffixFor(JVMPlatform).in(file("."))
-  .settings(ScalaModulePlugin.scalaModuleSettings)
-  .jvmSettings(ScalaModulePlugin.scalaModuleOsgiSettings)
+  .in(file("."))
   .settings(
+    ScalaModulePlugin.scalaModuleSettings,
     name := "scala-parser-combinators",
-    scalaModuleMimaPreviousVersion := None,
+    scalaModuleMimaPreviousVersion := None,  // until we publish 1.2.0
 
     apiMappings ++= scalaInstance.value.libraryJars.collect {
       case file if file.getName.startsWith("scala-library") && file.getName.endsWith(".jar") =>
@@ -40,6 +43,7 @@ lazy val parserCombinators = crossProject(JVMPlatform, JSPlatform, NativePlatfor
     }
   )
   .jvmSettings(
+    ScalaModulePlugin.scalaModuleOsgiSettings,
     OsgiKeys.exportPackage := Seq(s"scala.util.parsing.*;version=${version.value}"),
     libraryDependencies += "junit" % "junit" % "4.13.1" % Test,
     libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % Test
@@ -59,3 +63,7 @@ lazy val parserCombinators = crossProject(JVMPlatform, JSPlatform, NativePlatfor
       else libraryDependencies.value
     }
   )
+
+lazy val parserCombinatorsJVM    = parserCombinators.jvm
+lazy val parserCombinatorsJS     = parserCombinators.js
+lazy val parserCombinatorsNative = parserCombinators.native