Merge pull request #321 from mkurz/test_jdk_21

Also test with Java 21

Author: mkurz

.github/workflows/build-test.yml

@@ -12,7 +12,7 @@ jobs:
   build:
     strategy:
       matrix:
-        java: [ '8', '11', '17' ]
+        java: [ '8', '11', '17', '21' ]
         os: [ 'ubuntu-latest' ]
     runs-on: ${{ matrix.os }}
     steps:

pom.xml

@@ -98,8 +98,8 @@
               <artifactId>maven-compiler-plugin</artifactId>
               <version>3.13.0</version>
               <configuration>
-                  <source>1.7</source>
-                  <target>1.7</target>
+                  <source>8</source>
+                  <target>8</target>
               </configuration>
           </plugin>
           <plugin>