Fix compile on Java 20

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop-pdf-images/trunk@1904230 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/build.properties b/build.properties
index 5fdb550..4b26fa6 100644
--- a/build.properties
+++ b/build.properties
@@ -5,7 +5,7 @@
 javac.debug=on
 javac.deprecation=on
 javac.fork=off
-javac.source=1.7
-javac.target=1.7
+javac.source=1.8
+javac.target=1.8
 
 junit.fork=on
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 5819ed6..acd170e 100755
--- a/pom.xml
+++ b/pom.xml
@@ -10,8 +10,8 @@
   <url>https://xmlgraphics.apache.org/fop/fop-pdf-images.html</url>
 
   <properties>
-    <maven.compiler.source>1.7</maven.compiler.source>
-    <maven.compiler.target>1.7</maven.compiler.target>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <maven.compiler.target>1.8</maven.compiler.target>
   </properties>
 
   <dependencies>