*: add Automatic-Module-Name manifest attribute

This uses the 4.x artifact names to ease migration to the new version
when users are able to do so.

Author: zml2008

buildSrc/src/main/kotlin/org/spongepowered/configurate/build/ConfigurateDevPlugin.kt

@@ -55,6 +55,11 @@ class ConfigurateDevPlugin : Plugin<Project> {
                 it.from(rootProject.file("LICENSE")) {
                     it.rename { f -> "${f}_${project.name}" }
                 }
+                it.manifest {
+                    it.attributes(
+                            mapOf("Automatic-Module-Name" to "org.spongepowered.${project.name.replace("-", ".")}")
+                    )
+                }
             }
 
             extensions.configure(LicenseExtension::class.java) {

configurate-core/build.gradle.kts

@@ -10,3 +10,9 @@ dependencies {
   testImplementation("com.google.inject:guice:4.2.3")
   api("org.checkerframework:checker-qual:2.4.0")
 }
+
+tasks.jar {
+  manifest.attributes(
+      "Automatic-Module-Name" to "org.spongepowered.configurate"
+  )
+}

configurate-ext-kotlin/build.gradle.kts

@@ -10,6 +10,12 @@ tasks.withType(KotlinCompile::class).configureEach {
     kotlinOptions.freeCompilerArgs += listOf("-Xopt-in=kotlin.RequiresOptIn")
 }
 
+tasks.jar {
+    manifest.attributes(
+            "Automatic-Module-Name" to "org.spongepowered.configurate.extra.kotlin"
+    )
+}
+
 dependencies {
     api(project(":configurate-core"))
     implementation(kotlin("stdlib-jdk8"))

configurate-json/build.gradle.kts

@@ -8,3 +8,9 @@ dependencies {
   api(project(":configurate-core"))
   api("com.fasterxml.jackson.core:jackson-core:${Versions.JACKSON}")
 }
+
+tasks.jar {
+  manifest.attributes(
+          "Automatic-Module-Name" to "org.spongepowered.configurate.jackson"
+  )
+}