Migrate GH actions to java 11

Author: Shane Myrick

.github/workflows/maven.yml

@@ -12,9 +12,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v1
-      - name: Set up JDK 1.8
+      - name: Set up Java 11
         uses: actions/setup-java@v1
         with:
-          java-version: 1.8
+          java-version: 11
       - name: Build with Maven
-        run: mvn clean verify -PdefaultBuild -P!jdk8
+        run: mvn clean verify -PdefaultBuild