Upgrade slf4j to fix build error due to dependency convergence

Author: BURJA Lucian

pom.xml

@@ -123,7 +123,7 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>1.7.25</version>
+            <version>1.7.30</version>
         </dependency>
 
         <!-- Optional for supporting spring proxies -->