add properties for reproducible build
diff --git a/pom.xml b/pom.xml
index a987e78..35b585e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,6 +26,11 @@
<name>Apache Sling Commons Johnzon Wrapper Library</name>
<description>Apache Johnzon powered javax.json library</description>
+ <properties>
+ <sling.java.version>8</sling.java.version>
+ <project.build.outputTimestamp>2020-02-25T13:37:42Z</project.build.outputTimestamp>
+ </properties>
+
<scm>
<connection>scm:git:https://gitbox.apache.org/repos/asf/sling-org-apache-sling-commons-johnzon.git</connection>
<developerConnection>scm:git:https://gitbox.apache.org/repos/asf/sling-org-apache-sling-commons-johnzon.git</developerConnection>