Update safe-smart-account usage

[kronosapiens]

With the release of v1.4.0, the Safe team has renamed their contracts (changelog).

We should update our imports to use this new version, as the build scripts are currently failing on https://github.com/JoinColony/contractDeployment/tree/moreScripts-hardhat

[kronosapiens]

Note that this issue can be resolved by updating the build command from:

  return run('git', ['submodule', 'update', '--init', '--recursive', '--remote'], { cwd: CONTRACT_CWD });

to

  return run('git', ['submodule', 'update', '--init'], { cwd: CONTRACT_CWD });

which matches the command run in CI.