upgrade to polkadot v1.0.0

[brenzi]

integrates https://github.com/encointer/pallets/pull/332

CI

• srtool builds with stable now

[brenzi]

annoying: the trait bound encointer_primitives::scheduler::CeremonyPhaseType: Serialize is not satisfied

seems we lose the std feature somewhere along the way, but all tomls checked

[clangenb]

Serde error is fixed by updating to the newest encointer-pallet's commit, but the build is now stuck in the client because the api-client is still on v0.9.42: https://github.com/scs/substrate-api-client/issues/625

[brenzi]

seems like srtool needs an upgrade to a newer rustc