ci: simplify matrix on test job using include instead of exclude

Author: gotson

.github/workflows/test.yml

@@ -39,17 +39,13 @@ jobs:
     name: test ${{ matrix.os }} jdk${{ matrix.java }}
     strategy:
       matrix:
-        os: [ ubuntu-latest, windows-latest, macos-latest ]
-        java: [ 8, 11, 17 ]
-        exclude:
+        os: [ ubuntu-latest ]
+        java: [ 8, 17, 18 ]
+        include:
           - os: windows-latest
-            java: 11
-          - os: windows-latest
-            java: 8
-          - os: macos-latest
-            java: 11
+            java: 18
           - os: macos-latest
-            java: 8
+            java: 18
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3