Don't run on some Java versions.

Author: smillst

.github/workflows/maven_tests.yml

@@ -34,8 +34,8 @@ jobs:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
         ## Different JDK versions have different implementations etc. -- test on all combinations (ideally 8 to latest).
         ### exclude pre-8 (min development version jdk8)
-        # typetools: Exclude 10 because of crashes in the compiler
-        jdk: [ 8,9,11,12,13,14,15,16,17 ]
+        # typetools: Exclude 10 because of crashes in the compiler, exclude others because they aren't found
+        jdk: [ 8,11,13,15,16,17 ]
     env:
       OS: ${{ matrix.os }}
       JDK: ${{ matrix.jdk }}