prepare release 3.1.4

Author: Mark

pom.xml

@@ -4,7 +4,7 @@
 
 	<groupId>com.arangodb</groupId>
 	<artifactId>arangodb-java-driver</artifactId>
-	<version>3.1.4-SNAPSHOT</version>
+	<version>3.1.4</version>
 	<inceptionYear>2012</inceptionYear>
 	<packaging>jar</packaging>