CI to stop testing for JDK8 (#299)

CI to test for JDK11, JDK17

Author: Mjl33

.github/workflows/maven.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java-version: [ 1.8, 1.11 ]
+        java-version: [ 1.11, 1.17 ]
     services:
       wiremock:
         image: rodolpheche/wiremock:2.27.2