Miscellaneous improvements to build scripts.

buildSrc/src/main/kotlin/CommonConfig.kt

@@ -6,11 +6,11 @@ fun Project.applyCommonConfiguration() {
     version = rootProject.version
 
     repositories {
-        mavenCentral()
         mavenLocal()
         maven { url = uri("https://mvn.intellectualsites.com/content/groups/public/") }
         maven { url = uri("https://plotsquared.com/mvn/") }
-        maven { url = uri("https://maven.enginehub.org/repo/")
+        maven {
+            url = uri("https://maven.enginehub.org/repo/")
             content {
                 excludeGroup("net.milkbowl.vault")
             }

buildSrc/src/main/kotlin/LibsConfig.kt

@@ -15,7 +15,7 @@ import org.gradle.kotlin.dsl.register
 fun Project.applyLibrariesConfiguration() {
     applyCommonConfiguration()
     apply(plugin = "java-base")
-    apply(plugin = "maven")
+    apply(plugin = "maven-publish")
     apply(plugin = "com.github.johnrengelman.shadow")
 
     configurations {

buildSrc/src/main/kotlin/PlatformConfig.kt

@@ -21,7 +21,7 @@ fun Project.applyPlatformAndCoreConfiguration() {
     apply(plugin = "java")
     apply(plugin = "eclipse")
     apply(plugin = "idea")
-    apply(plugin = "maven")
+    apply(plugin = "maven-publish")
 //    apply(plugin = "checkstyle")
     apply(plugin = "com.github.johnrengelman.shadow")