Twitter-server 19.12.0

• Upgrade to jackson 2.9.10 and jackson-databind 2.9.10.1 acf7e010
• Multiple changes have happened around query parameter retrieval in order
  to remove duplicated functionality from Twitter Server that exists in
  Finagle. Users are encouraged to use finagle-http's Uri class within their
  own code to retrieve params. b538228c
  • The parse method of HttpUtils has been removed.
  • The protected getParams method of TwitterHandler has been removed.
  • The signature of the getGraceParam method of ShutdownHandler has
    been changed to take a Request.
• Add a disableAdminHttpServer property to the AdminHttpServer that can be used to
  prevent the AdminHttpServer from starting by default on a TwitterServer. ecef399a
• The ResourceHandler companion object is no longer a JavaSingleton.
  c9defbf6
• Update ScalaTest to 3.0.8, and ScalaCheck to 1.14.0. d9b1fc04