fixes #29 Upgrade jetty to avoid using its vulnerable version
fixes #29 Upgrade jetty to avoid using its vulnerable version

- upgraded Jetty version to 9.4.12.v20180830

rpuch/superfly,payneteasy/superfly,payneteasy/superfly,payneteasy/superfly,rpuch/superfly,payneteasy/superfly,rpuch/superfly,rpuch/superfly