Improve response logger middleware output

[erichmachado]

Description

Currently, log output looks like this with the firmware enabled:

get https://api.example.com
Status: 200

This PR changes the log output to be formatted like this instead:

 request: GET https://api.example.com
response: Status 200

Where the request and response strings are set as the progname of the INFO log calls accordingly, just like the debug lines currently work.

Fixes #782

[huangyq23]

This looks great! Do you plan to release a new gem version?

[iMacTia]

Yeah plan was to release tomorrow, but it may actually be easier today.
I'm creating the tag now, so expect to see the release later today 👍