This is to address issue #320
## Introduced changes
- Added new_required_for_tests() method that includes EVM bytecode flags
- Modified new_required() to exclude evm.bytecode and
evm.deployedBytecode
- Updated test utilities to explicitly request EVM bytecode when needed
Signed-off-by: 0xf333 <0x333@tuta.io>
The differential testing framework will make a second consumer. There
seems to be no re-usable Rust crate for this. But we already have
everything here, just needs a small refactor to make it fully re-usable.
- Mostly decouple the solc JSON-input-output interface types from the
`solidity` frontend crate
- Expose the JSON-input-output interface types in a dedicated crate
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Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>