Raiden-common

* Fix problems introduced by update to web3 v6

* Update dependencies

* Remove typing extensions dependency by karlb in https://github.com/raiden-network/raiden-common/pull/24

* Remove RTC dependencies by konradkonrad in https://github.com/raiden-network/raiden-common/pull/16
* Fix tests/typing in python 3.10 by konradkonrad in https://github.com/raiden-network/raiden-common/pull/22
* Add http_retry_with_backoff_middleware by karlb in https://github.com/raiden-network/raiden-common/pull/23

* Add support for nitro ETH client

* Split off `raiden-common` package from `raiden` package to allow projects to depend on helpful code without pulling in the whole raiden client.