Write tests for hs-tendermint-client

[IvantheTricourne]

Testing spec:

• run Tendermint kv-store example
• test available Tendermint endpoints against the kv-store
• similar to existing example tests

Tests should verify ability to parse responses and run queries.

Endpoints:

• [x] /abci_info
• [x] /health
• [x] /abci_query
• [x] /block
• [x] /tx
• [x] /broadcast_tx_async
• [x] /broadcast_tx_sync
• [x] /broadcast_tx_commit

[IvantheTricourne]

Tendermint RPC Tx Endpoint Test

[IvantheTricourne]

Currently not able to query the /tx endpoint.

[IvantheTricourne]

Another example using tx: https://github.com/tendermint/tendermint/blob/v0.32.2/rpc/core/tx.go#L19-L32