Bug report: QueryValidatorsResponse ParseError in REST API

[Widlar]

Prerequisites

• I am running the latest CosmPy version.
• I checked the documentation and found no answer to my problem.
• I checked the existing issues to make sure my problem has not already been reported.
• I have read the code of conduct before creating this issue.

Expected Behavior

Using the REST version of the API, I am trying to get a list of Mainnet network validators.

Current Behavior

The server response cannot be turned into the protobuf message QueryValidatorsResponse.
The error occurs in the consensus_pubkey field.
That being said, I tried compiling my proto files for newer versions of Cosmos SDK, but the problem persists.

To Reproduce

This error is shown by the following code:

from cosmpy.aerial.client import LedgerClient, NetworkConfig
cfg = NetworkConfig(
    chain_id='fetchhub-4',
    url='rest+https://rest-fetchhub.fetch.ai',
    fee_minimum_gas_price=0,
    fee_denomination="afet",
    staking_denomination="afet",
    faucet_url=None,
)

ledger_client = LedgerClient(cfg)
validators = ledger_client.query_validators()
print(validators) `

### Context

My OS: Windows 10, I'm using cosmpy==0.5.1 (compiling main from github) and Python 3.8.0.

### Failure Logs

File "C:\Users\Sergey\Anaconda3\envs\sergey\lib\site-packages\google\protobuf\json_format.py", line 648, in _ConvertAnyMessage
raise ParseError('{0} at {1}'.format(e, path))
google.protobuf.json_format.ParseError: Can not find message descriptor by type_url: /cosmos.crypto.ed25519.PubKey at QueryValidatorsResponse.validators[0].consensus_pubkey
`

[Widlar]

I thought about it and was able to solve this problem by simply adding to the file:

cosmpy\aerial\client_init_.py

import:

from cosmpy.protos.cosmos.crypto.ed25519.keys_pb2 import PubKey

This import itself is not used directly, but is needed when turning proto messages into a dictionary. I will create Pull requests.

[solarw]

#294 fixed