If a `Request`'s version is `Http09`, `H2`, or `H2c`, `client.request` will return a `hyper::Error::Version`, and a message is logged at `error!` level. Closes #1283
If a `Request`'s version is `Http09`, `H2`, or `H2c`, `client.request` will return a `hyper::Error::Version`, and a message is logged at `error!` level. Closes #1283