Upgrade `jsonrpc` to version `0.18.0` #397

Job	Run time
Test - 1.56.1 toolchain (minimal)	2m 49s
Test - nightly toolchain (minimal)	41s
Test - 1.56.1 toolchain (recent)	2m 48s
Test - stable toolchain (minimal)	41s
Test - nightly toolchain (recent)	1m 0s
Integration tests - stable toolchain (0.18.0)	51s
Test - stable toolchain (recent)	38s
Integration tests - stable toolchain (0.18.1)	52s
Integration tests - stable toolchain (0.19.0.1)	1m 2s
Integration tests - stable toolchain (0.19.1)	1m 11s
Integration tests - stable toolchain (0.20.0)	1m 2s
Integration tests - stable toolchain (0.20.1)	1m 4s
Integration tests - stable toolchain (0.21.0)	1m 3s
	15m 42s

Provide feedback