Cyclic deps

[DaniPopes]

Rust Analyzer throws errors due to cyclic deps in ethers-derive-eip712 and ethers-middleware/ethers-contract. Already mentioned in #481 (comment), although I don't think the follow-up PR happened ^^

Log:

[ERROR project_model::workspace] cyclic deps: ethers_derive_eip712(CrateId(152)) -> ethers_contract(CrateId(147)), alternative path: ethers_contract(CrateId(147)) -> ethers_derive_eip712(CrateId(152))
[ERROR project_model::workspace] cyclic deps: ethers_middleware(CrateId(155)) -> ethers_contract(CrateId(147)), alternative path: ethers_contract(CrateId(147)) -> ethers_middleware(CrateId(155))
[ERROR project_model::workspace] cyclic deps: ethers_signers(CrateId(165)) -> ethers_contract(CrateId(147)), alternative path: ethers_contract(CrateId(147)) -> ethers_derive_eip712(CrateId(152)) -> ethers_signers(CrateId(165))
[ERROR project_model::workspace] cyclic deps: ethers_signers(CrateId(165)) -> ethers_derive_eip712(CrateId(152)), alternative path: ethers_derive_eip712(CrateId(152)) -> ethers_signers(CrateId(165))
[ERROR project_model::workspace] cyclic deps: ethers_derive_eip712(CrateId(152)) -> ethers_contract(CrateId(147)), alternative path: ethers_contract(CrateId(147)) -> ethers_derive_eip712(CrateId(152))
[ERROR project_model::workspace] cyclic deps: ethers_middleware(CrateId(155)) -> ethers_contract(CrateId(147)), alternative path: ethers_contract(CrateId(147)) -> ethers_middleware(CrateId(155))
[ERROR project_model::workspace] cyclic deps: ethers_signers(CrateId(165)) -> ethers_contract(CrateId(147)), alternative path: ethers_contract(CrateId(147)) -> ethers_derive_eip712(CrateId(152)) -> ethers_signers(CrateId(165))
[ERROR project_model::workspace] cyclic deps: ethers_signers(CrateId(165)) -> ethers_derive_eip712(CrateId(152)), alternative path: ethers_derive_eip712(CrateId(152)) -> ethers_signers(CrateId(165))

[DaniPopes]

#1714 does fix the ethers-derive-eip712, thanks @mattsse, but there's a few more

I'm using the rust-analyzer extension for VS Code and the logs are under the Output > Rust Analyzer Language Server

[ERROR project_model::workspace] cyclic deps: ethers_middleware(CrateId(155)) -> ethers_contract(CrateId(147)), alternative path: ethers_contract(CrateId(147)) -> ethers_middleware(CrateId(155))
[ERROR project_model::workspace] cyclic deps: ethers_signers(CrateId(165)) -> ethers_contract(CrateId(147)), alternative path: ethers_contract(CrateId(147)) -> ethers_middleware(CrateId(155)) -> ethers_signers(CrateId(165))