CI tests with Java 17 instead of Java 16 (#65)

Author: ebourg

.github/workflows/maven.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '8', '11', '16' ]
+        java: [ '8', '11', '17' ]
     name: Build/Test with Java ${{ matrix.Java }}
 
     steps: