QPID-8502: Upgrade jetty version

This closes #79
diff --git a/pom.xml b/pom.xml
index da05d51..fe5b77d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -109,7 +109,7 @@
     <fasterxml-jackson-version>2.11.2</fasterxml-jackson-version>
     <fasterxml-jackson-databind-version>2.11.2</fasterxml-jackson-databind-version>
     <slf4j-version>1.7.30</slf4j-version>
-    <jetty-version>9.4.31.v20200723</jetty-version>
+    <jetty-version>9.4.35.v20201120</jetty-version>
 
     <!-- dependency version numbers -->
     <bonecp-version>0.7.1.RELEASE</bonecp-version>