update ruby and dependencies, add `license_finder`
configure `license_finder`
update `rubocop` quote interpolation settings
update deprecated ChefSpec syntax:

* use `SoloRunner`
* configure RSpec to raise for deprecations
update `serverspec` setup, add a few expectations
update config & attributes to match latest release
prevent upgrade from prompting to overwrite config
ensure the `pidfile` directory exists
support `upstart` service supervisor on ubuntu
add `centos-6.5` platform to `test-kitchen` suites
add support for `labels` attribute
update CI, add `bundle-audit` and `license_finder`
Merge pull request #22 from phlipper/updates

Project Updates