Security upgrades to dev dependencies

[findlay-hannam]

npm audit found some security vulnerabilities in dependencies of this module. This PR does all the security upgrades possible at this time.

I've created ivanplenty/binford-logger#1 and ivanplenty/binford-slf4j#1 to upgrade the dependencies of our dependencies, but the owner hasn't been active on public repos in years. If those PRs aren't looked at, we can make a new npm dependency from my forks, or switch to something like https://www.npmjs.com/package/xxlogger, to resolve the rest of the dependency vulnerabilities.

[tootedom]

I've removed binford, and migrated to using an event emitter for the logging.
I've pushed an update of the library (1.0.0), the readme (https://github.com/tootedom/campbellcache#logging) shows how to register for the logs being emitted. Using the event emitter means you can use any logging library of your choosing.

cheers.