* FollowEvent::stop include backend closed or not * simplify code: enum variant BackendClosed * check both stopped and backend closed * simplify hacky code * remove old test * Update subxt/src/backend/chain_head/follow_stream_driver.rs * Update subxt/src/backend/chain_head/mod.rs * Update subxt/src/backend/chain_head/mod.rs * Update subxt/src/backend/chain_head/follow_stream_driver.rs
* rpc: stabilize ChainHeadBackend * remove noise from example * add missing features * make tests compile * make tests compile v2 * revert stop event * feature-gate runtime * Update subxt/Cargo.toml * add docsrs feature stuff * Update subxt/src/backend/chain_head/mod.rs * Update subxt/src/backend/chain_head/mod.rs * Update subxt/src/backend/chain_head/mod.rs