Finality check for the cli

[hamdiallam]

Summary

the cli currently has no finality bound check when interacting with the smart contract. include-deposit and deposit can make use of a finality bound in their implementation

Problem

the finality bound parameter was removed in the CLI config file in PR #157 since it was not being used.

Proposal

Implement a finality check where required and reintroduce the parameter in the config

[hamdiallam]

We should add a plasmad query that allows plasmacli to ask for it's finality bound versus hardcoding the finality parameter. We should also have a persistent --finality flag that allows the user to set a custom finality bound as well