New format for JSON Artifacts with Cairo 1.0

[Rog3rSm1th]

The JSON artifact format of Cairo 1.0 contracts slightly differs from the old format. Therefore when we try to parse a JSON artifact generated with Cairo 1.0 we get a NotImplementedError due to this.

To be able to fix this issue we need to modify the ABI Parser to handle the new format.

An example of Cairo 1.0 JSON Artifact: https://raw.githubusercontent.com/starkware-libs/cairo/1fe2c3368262ee579cc7e58703217407d41b4514/crates/cairo-lang-starknet/test_data/erc20.json