fix errors dep + tests (#54)

update error dep (#53)

slog support + Groups (#52)

Update log.go (#50)

fix unhashable value during dedupe process (#48)

V8.0.0 rc9 (#47)

fix appending fields in clone() method (#46)

V8.0.0 rc7 (#45)

- Removed ability to remove individual log levels. Can use AddHandler
  and RemoveHandler to accomplish the same. Will leave it this way
  unless there's a compelling reason to expose this functionality.
- Move std log redirect to top level our of console handler.
- Add error and warning checks for std log output
- fix std log redirect reset

add log level parser helper (#44)

rename console logger builder + function (#43)