Add chalk to dependencies

[kevinji]

These packages were implicitly pulling in chalk (via @openzeppelin/upgrades-core); this makes the dependency more explicit.

[Amxx]

Hello @kevinji

As you pointed out, chalk is already in the dependencies of @openzeppelin/upgrades-core. Is there any good reason to not rely on dependency chaining and making it explicit? If so, why only chalk and not the other dependencies in upgrades-core?

Unless there is a strong reason to add it, I'd prefer to putting superfluous things in the package.json

[frangio]

Chalk is used directly by hardhat-upgrades and truffle-upgrades so I agree with including it as a dependency.

Thanks @kevinji!