Guillem Nieto b168c38d83 Use Pdu on create_join_event endpoints
Sending requests to this endpoints to Synapse/Dendrite homeservers leads
to some deserialization errors.

After claryfing it
(https://github.com/matrix-org/matrix-doc/issues/2856), `room_id` and
`event_id` fields are expected to appear on request's body and also on
path params. It seems that there's some initiative, in any case, to
remove the parameters from path:
https://github.com/matrix-org/matrix-doc/issues/2330
2020-11-18 19:30:23 +01:00
..
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