`RPCError` does not conform to`RPCErrorConvertible`

[0xTim]

Is your feature request related to a problem? Please describe it.

Currently RPCError doesn't conform to RPCErrorConvertible - this can make it harder when catching errors in interceptors or catch blocks as you have to handle both types.

Describe the solution you'd like

Conform RPCError to RPCErrorConvertible

Describe alternatives you've considered

N/A

Additional context

N/A

[glbrntt]

Adding conformance seems totally reasonable; do you want to open a PR for this Tim?

[0xTim]

Done!