build(deps): bump jetty.version from 9.4.26.v20200117 to 11.0.1

Bumps `jetty.version` from 9.4.26.v20200117 to 11.0.1.

Updates `jetty-servlets` from 9.4.26.v20200117 to 11.0.1
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](jetty/jetty.project@jetty-9.4.26.v20200117...jetty-11.0.1)

Updates `jetty-server` from 9.4.26.v20200117 to 11.0.1
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](jetty/jetty.project@jetty-9.4.26.v20200117...jetty-11.0.1)

Updates `jetty-servlet` from 9.4.26.v20200117 to 11.0.1
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](jetty/jetty.project@jetty-9.4.26.v20200117...jetty-11.0.1)

Updates `jetty-webapp` from 9.4.26.v20200117 to 11.0.1
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](jetty/jetty.project@jetty-9.4.26.v20200117...jetty-11.0.1)

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -61,7 +61,10 @@
     <surefireArgs/>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <jackson.version>2.12.1</jackson.version>
+    <servlet-api.version>3.1.0</servlet-api.version>
+    <butterfly.version>1.1.1</butterfly.version>
     <slf4j.version>1.7.30</slf4j.version>
+    <jetty.version>11.0.1</jetty.version>
   </properties>