Restricted used jdks to 7-10
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index f9351ff..e6e81c3 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -9,7 +9,7 @@
     strategy:
       matrix:
         os: [ubuntu-18.04, macOS-latest, windows-2016]
-        java: [7, 8, 8.0.192, 9, 10, 11, 11.0.3, 12, 13, 13.0.4, 14, 15]
+        java: [7, 8, 8.0.192, 9, 10]
       fail-fast: false
       max-parallel: 4
     name: Test JDK ${{ matrix.java }}, ${{ matrix.os }}