Support nearcore 1.37

[telezhnaya]

We need to adapt to new or changed RPC methods.

More details: https://github.com/near/nearcore/blob/447572bb775a5954ca7a5a4b65c85b45aab9e499/chain/jsonrpc/CHANGELOG.md#023
Copy-pasting the most important parts here

Added send_tx method which gives configurable execution guarantees options and potentially replaces existing broadcast_tx_async, broadcast_tx_commit
Field final_execution_status is presented in the response of methods tx, EXPERIMENTAL_tx_status, broadcast_tx_commit, send_tx
Allowed use json in request for methods EXPERIMENTAL_tx_status, tx, broadcast_tx_commit, broadcast_tx_async, send_tx
Parameter wait_until (same entity as final_execution_status in the response) is presented as optional request parameter for methods EXPERIMENTAL_tx_status, tx, send_tx. The response will be returned only when the desired level of finality is reached
Breaking changes

Removed EXPERIMENTAL_check_tx method. Use tx method instead
Removed EXPERIMENTAL_broadcast_tx_sync method. Use send_tx method instead

The updates timeline: near/nearcore#10404

With the fact that we don't support non-finalised data yet, final_execution_status field can be always filled with FINAL. OFK, this logic will be more complicated when we add support of optimistic blocks.

[kobayurii]

#169

[kobayurii]

#195

[kobayurii]

https://github.com/near/read-rpc/releases/tag/v0.2.0-rc.1