Remove aiortc dependency

This was accidentally backported from develop but isn't supposed to be
included yet.

Merge pull request raiden-network#6405 from raiden-network/release-v1…

….1.1

Release v1.1.1

Bump version: v1.0.2-rc → 1.1.0

fixed conf.py version

fix typos

Alderaan

bumpversion to 0.200.0-rc9

Fix RaidenService._log_sync_progress

Fixed calculation of the block range and blocks / s values.

Release 0.200.0-rc7

Bump version: 0.200.0-rc5 → v0.200.0-rc6