As a dev user, I want to build on BSC

[alexwhte]

Problem

BSC is possibly in scope of our public beta launch, depending on complexity. Connector added with Defi Wonderland here https://github.com/connext/nxtp/pull/1766

Note per @LayneHaber
Defi wonderland tested the connector logic, but I just don’t know if you need to kick off a processing tx on mainnet

Ideas to solve this

Add full stack support for BSC

• [ ] Deploy contracts
• [ ] Subgraphs
• [ ] Change config
• [ ] Any liquidity provisioning

Acceptance Criteria

• [ ] Bridging to and from BSC works fast path
• [ ] Bridging to and from BSC works slow path
• [ ]