* service/src/lib.rs: Register network event stream for authority disc

Previously one would create a sender and receiver channel pair, pass the
sender to the build_network_future through the service builder and
funnel network events returned from polling the network service into the
sender to be consumed by the authority discovery module owning the
receiver.

With recent changes it is now possible to register an event_stream
with the network service directly, thus one does not need to make the
detour through the build_network_future.

This commit is an adjusted clone of one targeting the Substrate
repository.

* service/src/lib.rs: Fix futures::stream imports

* [TMP] *: Replace polkadot-upstream with feature branch

* Revert "[TMP] *: Replace polkadot-upstream with feature branch"

This reverts commit 0c947b04.

* Bump Substrate & runtime version

* Attempt at fix

* Update runtime/kusama/src/lib.rs

Co-Authored-By: Bastian Köcher <[email protected]>

Co-authored-by: Bastian Köcher <[email protected]>

* Allow both polkadot and kusama runtimes

* Allow both polkadot and kusama runtimes

* Make `collator` build

* Removed kusama runtime

* Introduced common runtime

* Updated for latest substrate

* Updated CI targets

* Updated CI version check

* Removed unused dependency

* Pulled latests substrate

* Pulled latest substrate

* Fixed version

* Apply suggestions from code review

Co-Authored-By: Bastian Köcher <[email protected]>

* NEW_HEADS_IDENTIFIER moved to primitives

* Updated CI check script

* Fixed script

* Set epoch duration for polkadot

* ci: check_runtime for both runtimes

Co-authored-by: Bastian Köcher <[email protected]>
Co-authored-by: gabriel klawitter <[email protected]>

* update availability store

* also fix warning

* update Cargo.lock

* ci: fix release tagging after tags are added on the master branch

* ci: latest tag applied to latest tag

* Update to latest Substrate master

* Bump Substrate and runtime version

Co-authored-by: Bastian Köcher <[email protected]>

* Updates, but won't build.

* Bump version.

* Fix

* Fix test

* Introduce an event for when transaction fees are paid

* Fix

Co-authored-by: Bastian Köcher <[email protected]>

* Update to latest Substrate master

* Fix tests

* Increase the minimum treasury bond to reduce silly proposals

* Bump substrate

* Bump version

* Propagate Substrate#4284 to Polkadot

* Fix tests

* Fixes

* Use hash part of fund id as child unique id.

* Add comma

* Switch branch

* run cargo update

* Update polkadot-master only

* Fix collator