feat(payment-detection): add subgraphMinIndexedBlock option

[alexandre-abrioux]

Context

When using TheGraph decentralized network, different GQL queries can target different indexers. For consistency, we can ask to target only indexers that have processed specific blocks using a block filter.

For more info, see here or here, look for number_gte in these pages.

Description of the changes

• Added a new option subgraphMinIndexedBlock to the PaymentNetworkOptions
• Simplified all detectors instantiation. Since they are all passed the same options (see here) they all can have the same constructor. It simplifies adding new options without having to update every detector manually.

[coveralls]

coverage: 86.918%. remained the same
when pulling 42aebe9 on subgraph-min-indexed-block
into 71b2c46 on master.

[benjlevesque]

I feel the option is a bit awkward, I'd rather have it directly on the client, see my proposal

[benjlevesque]

Also, I wonder if grouping the options is a good move, considering #1202 and #1211

[alexandre-abrioux]

Closing this in favor of #1262 following @benjlevesque's recommendations