Start publishing velocity-natives module

Note that this will remain internal API for Velocity and the publication of the module does not necessarily indicate that they will be stable.

api/build.gradle

@@ -5,6 +5,7 @@ plugins {
 }
 
 apply from: '../gradle/checkstyle.gradle'
+apply from: '../gradle/publish.gradle'
 apply plugin: 'com.github.johnrengelman.shadow'
 
 sourceSets {

gradle/publish.gradle

@@ -0,0 +1,16 @@
+publishing {
+    repositories {
+        maven {
+            credentials {
+                username System.getenv("NEXUS_USERNAME")
+                password System.getenv("NEXUS_PASSWORD")
+            }
+
+            name = 'velocity-nexus'
+            def base = 'https://nexus.velocitypowered.com/repository/velocity-artifacts'
+            def releasesRepoUrl = "$base-releases/"
+            def snapshotsRepoUrl = "$base-snapshots/"
+            url = version.endsWith('SNAPSHOT') ? snapshotsRepoUrl : releasesRepoUrl
+        }
+    }
+}

native/build.gradle

@@ -1,9 +1,11 @@
 plugins {
     id 'java-library'
     id 'checkstyle'
+    id 'maven-publish'
 }
 
 apply from: '../gradle/checkstyle.gradle'
+apply from: '../gradle/publish.gradle'
 
 dependencies {
     implementation "com.google.guava:guava:${guavaVersion}"