• Added EXPERIMENTAL support for Server-Sent Events.
  
• Added EXPERIMENTAL module Mojo::SSE.
  
• Added EXPERIMENTAL sse attribute to Test::Mojo.
  
• Added EXPERIMENTAL get_sse_ok, post_sse_ok, sse_finish_ok, sse_finished_ok, sse_ok, sse_id_is, sse_id_isnt,
  sse_text_is, sse_text_isnt, sse_text_like, sse_text_unlike, sse_type_is and sse_type_isnt methods to Test::Mojo.
  
• Added EXPERIMENTAL is_sse and write_sse methods to Mojo::Content.
  
• Added EXPERIMENTAL write_sse method to Mojolicious::Controller.
  
• Added EXPERIMENTAL sse event to Mojo::Content.
  
• Fixed a bug where query parameters could not be set to undef. (ether)
  
• Fixed a bug where Host headers were not initialized correctly. (ether)