Merge branch 'dev/ci' into rc/1.13

# Conflicts:
#	build.gradle
#	gradle.properties

build.gradle

@@ -1,11 +1,14 @@
+//file:noinspection GroovyAssignabilityCheck
 plugins {
     id 'java'
+    id 'maven-publish'
     id 'jacoco'
 }
 
 project.group = 'ghast'
-project.version = '1.12.2-SNAPSHOT'
 jar.archiveBaseName.set(project.name)
+project.version = '1.12.2-SNAPSHOT'
+def gitlab_projectid = 23328133
 
 compileJava {
     sourceCompatibility = targetCompatibility = JavaVersion.VERSION_1_8
@@ -17,6 +20,7 @@ repositories {
     mavenCentral()
     maven { url 'https://hub.spigotmc.org/nexus/content/groups/public' }
     maven { url 'https://dmx-mc-project.gitlab.io/maven-repository/' }
+    maven { url "https://gitlab.com/api/v4/projects/${gitlab_projectid}/packages/maven" }
 }
 
 def lombokVersion = '1.18.20'
@@ -60,3 +64,28 @@ jacoco {
 jacocoTestReport {
     dependsOn test
 }
+
+publishing {
+    publications {
+        mavenBinary(MavenPublication) {
+            groupId = project.group
+            artifactId = project.name
+            version = project.version
+
+            from components.java
+        }
+    }
+
+    repositories {
+        maven {
+            url "https://gitlab.com/api/v4/projects/${gitlab_projectid}/packages/maven"
+            credentials(HttpHeaderCredentials) {
+                name = 'Job-Token'
+                value = System.getenv('CI_JOB_TOKEN')
+            }
+            authentication {
+                header(HttpHeaderAuthentication)
+            }
+        }
+    }
+}