build(deps): bump tower from 0.4.13 to 0.5.1 #5144

Job	Run time
Cargo fmt	16s
Check unused dependencies	1m 11s
Cargo check (WASM)	2m 15s
Cargo clippy (WASM)	1m 58s
Check documentation and run doc tests	11m 26s
Cargo check	6m 42s
Cargo clippy	8m 31s
Test (Native)	0s
Test (no_std)	2m 18s
Test (Unstable Backend)	0s
Test (Light Client)	0s
Test (WASM)	0s
	34m 37s

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