updates for version 2.5.6

Author: Achim Brandt

Diff for: README.md

@@ -26,13 +26,13 @@ To add the driver to your project with maven, add the following code to your pom
   <dependency>
     <groupId>com.arangodb</groupId>
     <artifactId>arangodb-java-driver</artifactId>
-    <version>[2.5.5-SNAPSHOT,2.5.5]</version>
+    <version>2.5.6</version>
   </dependency>
 	....
 </dependencies>
 ```
 
-If you want to test with a snapshot version (e.g. 2.5.5-SNAPSHOT), add the staging repository of oss.sonatype.org to your pom.xml:
+If you want to test with a snapshot version (e.g. 2.5.7-SNAPSHOT), add the staging repository of oss.sonatype.org to your pom.xml:
 
 ```XML
 <repositories>

Diff for: pom.xml

@@ -4,7 +4,7 @@
 
 	<groupId>com.arangodb</groupId>
 	<artifactId>arangodb-java-driver</artifactId>
-	<version>2.5.6-SNAPSHOT</version>
+	<version>2.5.6</version>
 	<inceptionYear>2012</inceptionYear>
 	<packaging>jar</packaging>