JCR-5190: webapp: bump htmlunit to 4.19.0 (#313)

Author: reschke

jackrabbit-webapp/pom.xml

@@ -104,7 +104,7 @@
     <dependency>
       <groupId>org.htmlunit</groupId>
       <artifactId>htmlunit</artifactId>
-      <version>4.18.0</version>
+      <version>4.19.0</version>
       <scope>test</scope>
       <exclusions>
         <exclusion>