Test major Java versions with GitHub actions as documented on
https://github.com/actions/setup-java
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 2ed8656..bc6b200 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -23,7 +23,7 @@
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '1.8', '11.0.4', '12.0.2' ]
+        java: [ 8, 11, 12, 13, 14 ]
         
     steps:
     - uses: actions/checkout@v1