0.7.0

The goal for this release was to refactor ring-logger and remove the timbre & onelog dependencies.

Breaking changes:

• Remove timbre implementation, was moved to ring-logger-timbre
• Remove OneLog implementation, was moved to ring-logger-onelog
• Replace keyword arguments with a proper map in wrap-with-logger
• Replace :logger-impl param to :logger
• Make Logger protocol more simple: It has just two fns now: log and add-extra-middleware