Update dependency ch.qos.logback:logback-classic to v1.2.8

Author: dev-mend-for-github-com[bot]

pom.xml

@@ -17,7 +17,7 @@
         <commons-dbcp.version>1.4</commons-dbcp.version>
         <jstl.version>1.2</jstl.version>
         <junit.version>4.10</junit.version>
-        <logback.version>1.1.3</logback.version>
+        <logback.version>1.2.8</logback.version>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
     </properties>