Update for slf4j lib

Author: javabeanz

pom.xml

@@ -41,7 +41,7 @@
       <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-api</artifactId>
-        <version>1.7.21</version>
+        <version>1.7.25</version>
       </dependency>
       <dependency>
         <groupId>junit</groupId>