Support networks with same chain id but different names

[taminomara]

Hardhat deploy supports having different networks with the same chain id. For example, you can have rinkeby and rinkeby-testing. Both are rinkeby, but contract addresses and ABIs can be different.

It may be beneficial to support this in ethcontract-rs.

[nlordell]

Also, in general, its probably safer to differentiate on chain ID instead of network ID.

Do you know if it uses the chain ID as the differentiating factor, or something else?

[taminomara]

Oh yeah, it uses chain id. Sorry, my bad. I'll update the issue.