fix(JeetySecurity): upgrade Jetty-Server (#1241)

- upgrade jetty-server to 9.4.39.v20210325, fixng the snyk.io issue.

fix #1240

Co-authored-by: Frédéric Delorme <frederic.delorme@versusmind.eu>

pom.xml

@@ -30,7 +30,7 @@
 
     <properties>
         <java.version>1.8</java.version>
-        <jetty.version>9.4.33.v20201020</jetty.version>
+        <jetty.version>9.4.39.v20210325</jetty.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <powermock.version>1.7.4</powermock.version>
         <mockito.version>1.10.19</mockito.version>