add 16-ea and use 15 final

Signed-off-by: olivier lamy <olamy@apache.org>

Author: olamy

.github/workflows/maven.yml

@@ -25,7 +25,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest,windows-latest, macOS-latest]
-        java: [8, 11, 14, 15-ea]
+        java: [8, 11, 14, 15, 16-ea]
       fail-fast: false
 
     runs-on: ${{ matrix.os }}