Configure transaction log level

[kevinmichaelchen]

Great work on this library! It's really useful for debugging 👍🏼

I'm wondering if these log levels can be made configurable instead of being hard-coded to Debug level.

[simukti]

@kevinmichaelchen Thanks, that is intentionally hard-coded at the moment.

There are lots of method that is still use hard-coded log-level, especially Debug and Trace.
But if "upstream call" in those method return error, it will change the level to Error.

I think I don't need to make all of them configurable.