demo: Bump mina version

Author: kohlschuetter

junixsocket-demo/pom.xml

@@ -79,7 +79,7 @@
         <dependency>
             <groupId>org.apache.mina</groupId>
             <artifactId>mina-core</artifactId>
-            <version>2.2.3</version>
+            <version>2.2.4</version>
             <exclusions>
                 <exclusion>
                     <groupId>org.slf4j</groupId>