* fix(http client): serde_json::Value -> T

This PR changes the http client to decode the reponse as `Response<serde_json::Value> -> Response<R>`
In order to get a more user-friendly error message

Before:

```
response: Err(ParseError(Error("missing field `error`", line: 1, column: 3752798)))
```

After

```
2022-08-11T13:57:12.033043Z  INFO http: r: Parse error: invalid type: string "lo", expected u8
```

* address grumbles

* Update client/http-client/src/client.rs

* Update client/http-client/src/client.rs