Deepcopy network

[BlinkyStitt]

If we copy instead of deepcopy, then when the network name is overwritten with the RPC url, later calls do not set "explorer" or "chain_id" (since line 87 is looking for names and not RPCs).

Without this change, the active_network config is missing: , 'chainid': '1', 'explorer': 'https://api.etherscan.io/api'}

>>> print(CONFIG.active_network)
{'name': 'Hardhat (Mainnet Fork)', 'id': 'hardhat-fork', 'cmd': 'npx hardhat node', 'host': 'http://127.0.0.1', 'multicall2': '0x5BA1e12693Dc8F9c48aAD8770482f4739bEeD696', 'cmd_settings': {'port': 8545, 'fork': 'https://turbo-eth.stytt.com/', 'chain_id': 1}, 'settings': {'gas_limit': 'max', 'gas_buffer': 1, 'gas_price': 0, 'max_fee': None, 'priority_fee': None, 'reverting_tx_gas_limit': 'max', 'default_contract_owner': True, 'cmd_settings': None}, 'chainid': '1', 'explorer': 'https://api.etherscan.io/api'}

>>> network.disconnect()
Terminating local RPC client...

>>> network.connect("hardhat-fork")
Launching 'npx hardhat node --port 8545 --fork https://turbo-eth.stytt.com/'...

>>> print(CONFIG.active_network)
{'name': 'Hardhat (Mainnet Fork)', 'id': 'hardhat-fork', 'cmd': 'npx hardhat node', 'host': 'http://127.0.0.1', 'multicall2': '0x5BA1e12693Dc8F9c48aAD8770482f4739bEeD696', 'cmd_settings': {'port': 8545, 'fork': 'https://turbo-eth.stytt.com/', 'chain_id': 1}, 'settings': {'gas_limit': 'max', 'gas_buffer': 1, 'gas_price': 0, 'max_fee': None, 'priority_fee': None, 'reverting_tx_gas_limit': 'max', 'default_contract_owner': True, 'cmd_settings': None}}

Checklist

• I have confirmed that my PR passes all linting checks
• I have included test cases
• I have updated the documentation
• I have added an entry to the changelog

[BlinkyStitt]

I'm not sure the best way to write a test. I don't think tests when run with xdist will like having their rpc killed.