Merge pull request #32 from mkordas/update_surefire

Update maven-surefire-plugin to 2.18.1

pom.xml

@@ -148,7 +148,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.12</version>
+        <version>2.18.1</version>
         <configuration>
           <includes>
             <include>javassist/JvstTest.java</include>