Upgrade maxmind-db to 3.1.0

Author: oschwald

pom.xml

@@ -39,7 +39,7 @@
         <dependency>
             <groupId>com.maxmind.db</groupId>
             <artifactId>maxmind-db</artifactId>
-            <version>3.0.0</version>
+            <version>3.1.0</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>