Support JDK 18-GA and 19-EA on CI

Author: kazuki43zoo

.github/workflows/ci.yaml

@@ -1,5 +1,5 @@
 #
-#    Copyright 2012-2021 the original author or authors.
+#    Copyright 2012-2022 the original author or authors.
 #
 #    Licensed under the Apache License, Version 2.0 (the "License");
 #    you may not use this file except in compliance with the License.
@@ -24,7 +24,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        java: [8, 11, 17, 18-ea]
+        java: [8, 11, 17, 18, 19-ea]
         distribution: ['zulu']
       fail-fast: false
       max-parallel: 4