Added a release script and publish gradle task.

.github/workflows/release.yml

@@ -0,0 +1,20 @@
+name: Release
+on:
+  release:
+    types: [published]
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+
+      - name: Build with Gradle
+        run: gradle build
+
+      - name: Publish to GitHub Packages
+        run: gradle publish
+        env:
+          USERNAME: ${{ github.actor }}
+          TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test.yml

@@ -1,3 +1,4 @@
+name: Test
 on:
   push:
   pull_request:
@@ -8,7 +9,7 @@ jobs:
     strategy:
       matrix:
         java: [ 8, 10, 12, 13 ]
-    name: Java ${{ matrix.java }} sample
+    name: Java ${{ matrix.java }} test.
     steps:
       - uses: actions/checkout@v2
       - name: Setup java

build.gradle

@@ -1,5 +1,10 @@
+plugins {
+    id("maven-publish")
+}
+
 apply plugin: 'java-library'
 apply plugin: 'java'
+
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
 
@@ -27,3 +32,21 @@ test {
         exceptionFormat "full"
     }
 }
+
+publishing {
+    repositories {
+        maven {
+            name = "GitHubPackages"
+            url = uri("https://maven.pkg.github.com/personnummer/java")
+            credentials {
+                username = project.findProperty("gpr.user") ?: System.getenv("USERNAME")
+                password = project.findProperty("gpr.key") ?: System.getenv("TOKEN")
+            }
+        }
+    }
+    publications {
+        gpr(MavenPublication) {
+            from(components.java)
+        }
+    }
+}