Added missing publication

eco-core/core-plugin/build.gradle

@@ -3,4 +3,14 @@ version rootProject.version
 
 dependencies {
     compileOnly 'org.spigotmc:spigot:1.16.4-R0.1-SNAPSHOT'
+}
+
+build.dependsOn publishToMavenLocal
+
+publishing {
+    publications {
+        maven(MavenPublication) {
+            from(components.java)
+        }
+    }
 }