Raiden-services

* Fix issues with DNS and logging ([937](https://github.com/raiden-network/raiden-services/pull/937)).
* Pin `raiden` requirement to specific commit in absence of a recent release.

* Change communication model to `toDevice` messages ([918](https://github.com/raiden-network/raiden-services/pull/918))
* Change the presence tracking model ([912](https://github.com/raiden-network/raiden-services/pull/912))
* Include user IDs in PFS route responses ([929](https://github.com/raiden-network/raiden-services/pull/929), [#933](https://github.com/raiden-network/raiden-services/pull/933))

* Improve registration script ([890](https://github.com/raiden-network/raiden-services/pull/890)) to allow for extension.
* Longer timeouts for first Matrix sync ([878](https://github.com/raiden-network/raiden-services/pull/878)).
* Adaptions for newer Matrix usage in Raiden.
* Dependency updates.

* Move metrics endpoint path outside the API ([870](https://github.com/raiden-network/raiden-services/pull/870))

* MS/PFS: Return `price_info` and `block_number` as strings in `/info` endpoint v2, since uint256 are not a safe part of JSON (https://github.com/raiden-network/raiden-services/pull/862)
* Service Registry: Wait until transactions are confirmed (https://github.com/raiden-network/raiden-services/issues/855)

* MS/PFS: Add prometheus endpoints for accessing metrics (https://github.com/raiden-network/raiden-services/pull/836)
* PFS: Return broadcast room ID in `info` endpoint (https://github.com/raiden-network/raiden-services/pull/858)
* MS/PFS: Add Python 3.8 support (https://github.com/raiden-network/raiden-services/pull/810)