Igor Urbanik

Migration `call` and `ProtostarFixture`

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edited by: @kasperski95 - added `call` migration cheatcode - added boundary/learning tests to `GatewayFacade` - added `ProtostarFixture` utility based on various experiments in order to: - simplify process of creating...

## Protostar version | Name | Version | | ---------- | -------------------- | | Protostar | `0.3.2` | | Cairo-lang | `0.9.1` | | Git | `2.37.2` | ## Current...