CQ-268 : Updated the undertow version

Author: NileshVirkar

pom.xml

@@ -55,7 +55,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <undertow.version>2.3.12.Final</undertow.version>
+        <undertow.version>2.3.18.Final</undertow.version>
         <project.scm.id>github</project.scm.id>
         <log4j.version>2.23.1</log4j.version>
     </properties>