Add pagination support for `getContractMapValuesByFirstKey` function

[map1336]

The release of the node version v3.8.0 has implemented pagination on the api request getATMapValues

Describe the solution you'd like

The function getContractMapValuesByFirstKey needs to support pagination

Additional context

Signum Node Release Changelog:
https://github.com/signum-network/signum-node/releases/tag/v3.8.0

SignumJS Api Documentation:
getContractMapValuesByFirstKey Link
https://signum-network.github.io/signumjs/modules/core_api_factories.html#getcontractmapvaluesbyfirstkey