Tokio seems a bit broken with Rocket...

Ruma updated the event signing validation code and there was a dep
resolving failure with serde rocket and tokio so I updated rocket latest and
tokio 1.0 to fix.

Fixed the miss named commented out keys in conduit-example.toml.

This also bumps ruma to latest and removes js_int infavor of the ruma
re-export

We didn't implement it, but this will stop clients from retrying the
endpoint every minute

remaining bug: conduit sends presence updates every 5 minutes even if
the user is already offline

This enables federation by default

TODO: we need to send pdus if a user of the appservice is in the room
but not the appservice user itself

Also query SRV records when well-known is not found, fixes #29

this also reverts some stateres changes