Added Gradle Publish

Author: aneesh-neelam

build.gradle

@@ -63,13 +63,23 @@ test {
 }
 
 publishing {
+    repositories {
+        maven {
+            name = "GitHubPackages"
+            url = uri("https://maven.pkg.github.com/aneesh-neelam/java-lib-aws-s3-iterator")
+            credentials {
+                username = project.findProperty("gpr.user") ?: System.getenv("GH_USERNAME")
+                password = project.findProperty("gpr.key") ?: System.getenv("GH_TOKEN")
+            }
+        }
+    }
     publications {
-        maven(MavenPublication) {
+        gpr(MavenPublication) {
             groupId = group
             artifactId = 'aws-s3-iterator'
             version = version
 
-            from components.java
+            from(components.java)
         }
     }
 }