Bump Substrate (#796)

* Bump Substrate to version used by Polkadot (`5f056830`)

* Use `log` crate for runtime logging

See https://github.com/paritytech/substrate/pull/8128/ for more info.

* Stop using return value from `execute_block`

* Update test weight

bridges/modules/call-dispatch/Cargo.toml

@@ -8,6 +8,7 @@ license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
 
 [dependencies]
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false }
+log = { version = "0.4.14", default-features = false }
 
 # Bridge dependencies
 
@@ -33,6 +34,7 @@ std = [
 	"bp-runtime/std",
 	"frame-support/std",
 	"frame-system/std",
+	"log/std",
 	"sp-core/std",
 	"sp-runtime/std",
 	"sp-std/std",