Use Java 11

Author: jerbob92

.github/workflows/build.yml

@@ -34,10 +34,10 @@ jobs:
           cd ../demo-angular && npm run ci.tslint
           cd ../demo-vue && npm run ci.tslint
 
-      - name: Setup JDK 1.8
+      - name: Setup JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 1.8
+          java-version: 11
 
       - name: Install PIP
         run: |