Improve querying (get a contract filtering by the GnosisSafe version that uses it)

[germartinez]

At first, it looks like every new version of the Safe contracts includes a new version for each contract (GnosisSafe, MultiSend, DefaultCallbackHandler, etc.) .

• GnosisSafe v1.1.1 uses MultiSend v1.1.1
• GnosisSafe v1.3.0 uses MultiSend v1.3.0

However, this is not always true. A specific version of the GnosisSafe contract might use a contract with a lower version number.

• GnosisSafe v1.2.0 uses MultiSend v1.1.1 (MultiSend v1.2.0 does not exist)

It would be useful to get the specific contract used by a given GnosisSafe version by adding a new filter with the GnosisSafe version to the DeploymentFilter.