Update the maven project to point at the latest guava version too.

shs96c · shs96c · commit d343aae32c6e · 2014-10-20T17:39:35.000+01:00
diff --git a/maven/pom.xml b/maven/pom.xml
@@ -139,7 +139,7 @@
             <dependency>
                 <groupId>com.google.guava</groupId>
                 <artifactId>guava</artifactId>
-                <version>15.0</version>
+                <version>18.0</version>
             </dependency>
             <dependency>
                 <groupId>commons-io</groupId>
