Allow also json/json.gz tar(.gz)s as Krill-Indexer input files

Change-Id: I80c839deb50be33e70903a5b406bac138f60056f
diff --git a/pom.xml b/pom.xml
index 1bcebe5..df64dc8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -224,6 +224,13 @@
       <artifactId>commons-io</artifactId>
       <version>2.19.0</version>
     </dependency>
+    
+    <!-- Apache Commons Compress for tar archive support -->
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-compress</artifactId>
+      <version>1.27.1</version>
+    </dependency>
   </dependencies>
 
   <build>