This reverts commit b989c303.

This reverts commit a6c19438.

* Companion pr for substrate#5448

* Update Substrate reference

* Adapt code to API changes

* Update sp-io

This pr ensures that the table router is always build, aka the future is
resolved. This is important, as the table router internally spawns tasks
to handle gossip messages. Handling gossip messages is not only required
on parachain validators, but also on relay chain validators to receive collations.

Tests are added to ensure that the assumptions hold.

* fix for offchain phragmen

* Update unix time stuff

* upgrade substrate

* fix telemetry endpoint

* improve msg

* upsub

* Revert branch change

* Fix some

* Fix build

* Add transaction source.

* Bump substrate.

* Fix tests.

* Adds a SigningContext type

* Bump spec versions

* Fixes requested changes

* Bump ParachainHost api_version and guard signing_context call

* Improve error message

* If there is no signing_context api use default value

Co-authored-by: Robert Habermeier <rphmeier@gmail.com>

* update new on_initialize syntax

* update substrate

* update spec_version

* Parachains double vote handler initial implementation.

* Make tests test the actual slashing.

* Implement SignedExtension validation of double vote reports.

* Fixes build after merge

* Review fixes

* Adds historical session proofs

* Review fixes.

* Bump runtime spec_version

* Get the session number from the proof

* Check that proof matches session

* Change signature type on DoubleVoteReport

* Adds docs and removes blank lines

* Removes leftover code

* Fix build

* Fix build after a merge

* Apply suggestions from code review

Co-Authored-By: Robert Habermeier <rphmeier@gmail.com>

* Prune ParentToSessionIndex

* Remove a clone and a warning

Co-authored-by: Robert Habermeier <rphmeier@gmail.com>
Co-authored-by: Gavin Wood <gavin@parity.io>

* Bump parity-util-mem

* Change util mem version to wildcard

* Updates for the new democracy

* Introduce progressive democracy

Also move to "master" branch of Substrate ready for continuous
sync with Substrate master.

* Add cli to wasm tests, update and bring closer to the substrate browser code

* Remove ws.js

* Update cli/src/browser.rs

Co-Authored-By: Pierre Krieger <pierre.krieger1708@gmail.com>

* Update browser.rs

Co-authored-by: Gavin Wood <gavin@parity.io>
Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

Co-authored-by: Gav Wood <gavin@parity.io>

we were getting double-posts for newly-published releases - we don't need to post to the channel when releases are updated.

* Move publish_draft_release to test stage

Also remove the alert_pending_release job since it's no longer needed

* delete alert_pending_release.sh

* Add splitting substrate changes into subsections

* Remove migration code.

* Bump Substrate

* Bump runtime

* Add clang

* Upgrade kvdb-rocksdb version

* bump version to v0.7.27

* update to latest substrate polkadot-master

* bump runtime impl_version

* hardfork the GRANDPA authority set in kusama to fix migration issue

* move grandpa integration code

* remove unnecessary grandpa hard fork

* update to latest substrate polkadot-master