deps(electrum): bump `electrum-client` to 0.22.0 #258

Job	Run time
Rust fmt	13s
Check WASM	34s
Check no_std	22s
Build and test (stable, true, --no-default-features --features miniscript/no-std)	2m 30s
prepare	3s
Build and test (stable, true, --all-features)	4m 13s
Build & Test Examples (example_cli)	17s
Build and test (1.63.0, --no-default-features --features miniscript/no-std)	3m 57s
Build & Test Examples (example_bitcoind_rpc_polling)	32s
Build and test (1.63.0, --all-features)	5m 55s
Build & Test Examples (example_electrum)	47s
Build & Test Examples (example_esplora)	59s
Build & Test Examples (example_wallet_electrum)	52s
Build & Test Examples (example_wallet_esplora_async)	1m 0s
Build & Test Examples (example_wallet_esplora_blocking)	56s
Build & Test Examples (example_wallet_rpc)	31s
clippy_check	1m 9s
	24m 50s

Provide feedback