streamflow: devnet deployment + BridgeMinter deploy script for mainnet

[yondonfu]

What does this pull request do? Explain your changes. (required)

This PR contains:

• Updates to deploy script and network configs to support a rinkebyDevnet network
• Adds a deployment for the rinkebyDevnet network
• Adds a deploy script for BridgeMinter for rinkeby + mainnet

Specific updates (required)

See commit history.

How did you test each of these updates (required)

N/A

Does this pull request close any open issues?

N/A

Checklist:

• [x] README and other documentation updated
• [x] All tests using yarn test pass