Refactor build configurations and downgrade to JDK 11

Moved 'createGithubPublication' block under 'publications' for code readability. JDK language level has been set to 11 for both project JDK and compiler settings to ensure consistency and avoid potential compilation issues.

Author: elect86

build.gradle.kts

@@ -22,26 +22,13 @@ dependencies {
 kotlin.jvmToolchain { languageVersion.set(JavaLanguageVersion.of(11)) }
 
 tasks {
-    withType<KotlinCompile<*>>().all {
-        kotlinOptions { freeCompilerArgs += listOf("-opt-in=kotlin.RequiresOptIn") }
-    }
+    withType<KotlinCompile<*>>().all { kotlinOptions { freeCompilerArgs += listOf("-opt-in=kotlin.RequiresOptIn") } }
 }
 
 testing.suites {
     val test by getting(JvmTestSuite::class) { useJUnitJupiter() }
 }
 
-publishing {
-    publications {
-        createGithubPublication("Github") {
-            from(components["java"])
-            suppressAllPomMetadataWarnings()
-        }
-    }
-    repositories { github { domain = "kotlin-graphics/mary" } }
-}
-
-
 java {
     withJavadocJar()
     withSourcesJar()
@@ -50,17 +37,17 @@ java {
 
 configure<PublishingExtension> {
     publications {
+        createGithubPublication("Github") {
+            from(components["java"])
+            suppressAllPomMetadataWarnings()
+        }
         create<MavenPublication>("mavenCentral") {
             groupId = "io.github.kotlin-graphics"
             artifactId = "kotlin-unsigned"
             from(components["java"])
             versionMapping {
-                usage("java-api") {
-                    fromResolutionOf("runtimeClasspath")
-                }
-                usage("java-runtime") {
-                    fromResolutionResult()
-                }
+                usage("java-api") { fromResolutionOf("runtimeClasspath") }
+                usage("java-runtime") { fromResolutionResult() }
             }
             pom {
                 name.set("kotlin-unsigned")
@@ -93,13 +80,13 @@ configure<PublishingExtension> {
         }
     }
     repositories {
+        github { domain = "kotlin-graphics/mary" }
         maven {
             name = "mavenCentral"
             credentials {
                 username = project.properties["NEXUS_USERNAME"].toString()
                 password = project.properties["NEXUS_PASSWORD"].toString()
             }
-
             url = uri("https://s01.oss.sonatype.org/content/repositories/releases/")
         }
     }