Update DL4J/ND4J to 0.9.1
diff --git a/opennlp-dl/pom.xml b/opennlp-dl/pom.xml
index 9899efe..cfa37b6 100644
--- a/opennlp-dl/pom.xml
+++ b/opennlp-dl/pom.xml
@@ -26,7 +26,7 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <nd4j.version>0.8.0</nd4j.version>
+    <nd4j.version>0.9.1</nd4j.version>
   </properties>
 
   <dependencies>