Add build for 11 and 17 as well

Author: rbygrave

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java_version: [8, 18-ea]
+        java_version: [8, 11, 17, 18-ea]
         os: [ubuntu-latest]
 
     steps: