Changes in libsoup from 2.99.2 to 2.99.3:

    * Fix soup_session_get_async_result_message() [Patrick Griffis]

    * Fix SoupMessage not always emitting notify single on property change [Carlos Garcia Campos]

    * Fix soup_message_query_flags() not returning a boolean [Patrick Griffis]

    * Revert requiring a GPollableInputStream for request bodies [Carlos Garcia Campos]

    * Rename soup_message_body_free() and soup_message_headers_free() to
      soup_message_body_unref() and soup_message_headers_unref() [Carlos Garcia Campos]

    * Rename SoupMessage:options-ping property to SoupMessage:is-options-ping and add
      soup_message_new_options_ping(), soup_message_get_is_options_ping(), and
      soup_message_set_is_options_ping() [Carlos Garcia Campos]

    * Add SOUP_HTTP_2_0 SoupHTTPVersion to be used later [Patrick Griffis]