[pom] Bump paren to 1.6.3

Author: hazendaz

pom.xml

@@ -19,7 +19,7 @@
     <parent>
         <groupId>com.github.tomcat-slf4j-logback</groupId>
         <artifactId>tomcat-slf4j-logback-parent</artifactId>
-        <version>1.6.2</version>
+        <version>1.6.3</version>
         <relativePath />
     </parent>