Adds new puppet-lint plugins to check for common deprecations.

Someday I'll post this on RubyGems.

For now, checkout and build locally, or allow Bundler's functionality to handle it all for you.

Checks for legacy Hiera 3 functions (hiera, hiera_hash, etc.).

If the --fix option is provided, it will attempt to change the hiera* function to an appropriate implementation of the lookup function.

Refer to this table for more information.