GitHub builds on Java 8, 11, and 14 (current), allow fails on 15-ea.

Author: garydgregory

.github/workflows/maven.yml

@@ -21,9 +21,14 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
         java: [ 8, 11, 14 ]
+        experimental: [false]
+        include:
+          - node: 15-ea
+            experimental: true        
 
     steps:
     - uses: actions/checkout@v2.3.1