Update RPC to v0.5.0

[tomek0123456789]

https://github.com/starkware-libs/starknet-specs/tree/v0.5.0-rc0

Related issues:

• FIx TransactionTraceSchema.get_data_type method after RPC v0.5.0 drop #1177
• Remove hack in FullNodeClient.get_block_traces #1169
• Investigate how to implement get_gas_price method #1140

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