Bumps `jetty.version` from 9.2.14.v20151106 to 9.4.18.v20190429. Updates `jetty-security` from 9.2.14.v20151106 to 9.4.18.v20190429 - [Release notes](https://github.com/eclipse/jetty.project/releases) - [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.2.14.v20151106...jetty-9.4.18.v20190429) Updates `jetty-webapp` from 9.2.14.v20151106 to 9.4.18.v20190429 - [Release notes](https://github.com/eclipse/jetty.project/releases) - [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.2.14.v20151106...jetty-9.4.18.v20190429) Updates `jetty-plus` from 9.2.14.v20151106 to 9.4.18.v20190429 - [Release notes](https://github.com/eclipse/jetty.project/releases) - [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.2.14.v20151106...jetty-9.4.18.v20190429) Updates `jetty-annotations` from 9.2.14.v20151106 to 9.4.18.v20190429 - [Release notes](https://github.com/eclipse/jetty.project/releases) - [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.2.14.v20151106...jetty-9.4.18.v20190429) Updates `apache-jsp` from 9.2.14.v20151106 to 9.4.18.v20190429 - [Release notes](https://github.com/eclipse/jetty.project/releases) - [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.2.14.v20151106...jetty-9.4.18.v20190429)
