Update tomcat to 8.5.23

Author: erichelgeson

build.gradle

@@ -55,7 +55,7 @@ ext {
     concurrentlinkedhashmapVersion = "1.4.2"
     cglibVersion = "2.2.2"
     objenesisVersion = "1.4"
-    tomcatVersion = "8.5.2"
+    tomcatVersion = "8.5.23"
     servletApiVersion = "3.0.1"
 
     isJava8Compatible = org.gradle.api.JavaVersion.current().isJava8Compatible()