Support batching multiple RPC requests

[franciszekjob]

Describe your changes

Suport batching multiple RPC requests

• add StarknetRequest and StarknetBatchRequest structs
• add StarknetProvider.batchRequests() accepting both list and variadic parameters
• add JsonRpcParams enum and extension
• add batch-related tests

Linked issues

Closes #186, #145

Breaking changes

• [x] This issue contains breaking changes

• StarknetAccount
  • executeV1(...) async throws -> StarknetInvokeTransactionResponse -> executeV1(...) -> StarknetRequest<StarknetInvokeTransactionResponse>
  • executeV3(...) async throws -> StarknetInvokeTransactionResponse -> executeV3(...) -> StarknetRequest<StarknetInvokeTransactionResponse>
  • executeV1(...) async throws -> StarknetInvokeTransactionResponse -> executeV1(...) -> StarknetRequest<StarknetInvokeTransactionResponse>
  • executeV3(...) async throws -> StarknetInvokeTransactionResponse -> executeV3(...) -> StarknetRequest<StarknetInvokeTransactionResponse>
  • estimateFeeV1(...) async throws -> StarknetFeeEstimate -> estimateFeeV1(...) -> StarknetRequest<[StarknetFeeEstimate]>
  • estimateFeeV3(...) async throws -> StarknetFeeEstimate -> estimateFeeV3(...) -> StarknetRequest<[StarknetFeeEstimate]>
  • estimateDeployAccountFeeV1(...) async throws -> StarknetFeeEstimate -> estimateDeployAccountFeeV1(...) -> StarknetRequest<[StarknetFeeEstimate]>
  • estimateDeployAccountFeeV3(...) async throws -> StarknetFeeEstimate -> estimateDeployAccountFeeV3(...) -> StarknetRequest<[StarknetFeeEstimate]>
  • getNonce() async throws -> Felt -> getNonce()-> StarknetRequest<Felt>
• StarknetProvider
  • specVersion() async throws -> String -> specVersion() -> StarknetRequest<String>
  • callContract(...) async throws -> [Felt] -> callContract(...) -> StarknetRequest<[Felt]>
  • estimateMessageFee(...) async throws -> StarknetFeeEstimate -> estimateMessageFee(...) -> StarknetRequest<StarknetFeeEstimate>
  • getNonce() async throws -> Felt -> getNonce() -> StarknetRequest<Felt>
  • addInvokeTransaction(...) async throws -> StarknetInvokeTransactionResponse -> addInvokeTransaction(...) -> StarknetRequest<StarknetInvokeTransactionResponse>
  • add addDeployAccountTransaction(...) async throws -> StarknetDeployAccountResponse -> addDeployAccountTransaction(...) -> StarknetRequest<StarknetDeployAccountResponse>
  • getClassHashAt(...) async throws -> Felt -> getClassHashAt(...) -> StarknetRequest<Felt>
  • getBlockNumber() async throws -> UInt64 -> getBlockNumber() -> StarknetRequest<UInt64>
  • getBlockHashAndNumber() async throws -> StarknetBlockHashAndNumber -> getBlockHashAndNumber() -> StarknetRequest<StarknetBlockHashAndNumber>
  • getEvents(...) async throws -> StarknetGetEventsResponse -> getEvents(...) -> StarknetRequest<StarknetGetEventsResponse>
  • getTransactionBy(...) async throws -> any StarknetTransaction -> getTransactionBy(...) -> StarknetRequest<StarknetTransaction>
  • getTransactionReceiptBy(...) async throws -> any StarknetTransactionReceipt -> getTransactionReceiptBy(...) -> StarknetRequest<StarknetTransactionReceipt>
  • getTransactionStatusBy(...) async throws -> StarknetGetTransactionStatusResponse -> getTransactionStatusBy(...) async throws -> StarknetRequest<StarknetGetTransactionStatusResponse>
  • getChainId() async throws -> StarknetChainId -> getChainId() -> StarknetRequest<StarknetChainId>
  • simulateTransactions(...) async throws -> [StarknetSimulatedTransaction] -> simulateTransactions(...) -> StarknetRequest<[StarknetSimulatedTransaction]>

[franciszekjob]

All requested changes have been addressed, I've also added few remarks about newly applied changes.