Adding github action for releasing .jar

.github/workflows/release.yml

@@ -0,0 +1,16 @@
+name: Publish package to GitHub Packages
+on:
+  release:
+    types: [created]
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Publish package
+        run: mvn -B deploy
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>org.sigsoft</groupId>
     <artifactId>submission-checker</artifactId>
-    <version>0.3.0</version>
+    <version>0.4.0</version>
     <packaging>jar</packaging>
 
     <properties>
@@ -114,4 +114,12 @@
             <version>1.9</version>
         </dependency>
     </dependencies>
+
+    <distributionManagement>
+        <repository>
+            <id>github</id>
+            <name>GitHub Packages</name>
+            <url>https://maven.pkg.github.com/acmsigsoft/submission-checker</url>
+        </repository>
+    </distributionManagement>
 </project>