Tweaked pom to specify guava as provided

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-server/pom.xml

@@ -89,6 +89,8 @@
       <groupId>com.google.guava</groupId>
       <artifactId>guava-collections</artifactId>
       <version>r03</version>
+      <type>jar</type>
+      <scope>provided</scope>
     </dependency>
   </dependencies>
   <!-- This builds a completely 'ready to start' jar with all dependencies inside -->