Create a new Perflab_Background_Job class to represent a single job and provide methods for accessing it's data.

Acceptance Criteria

• Create a new Perflab_Background_Job class
• The __construct() method should accept 1 parameter
  • $term - Can either be the Job term ID or term object
• The class should have the following methods
  • update_data( array $data ) - This method will update the jobs job_data term meta
  • data() This method will return an array of the jobs job_data term meta.
  • complete() - This method will update the following term meta.
    • job_completed_at - Set the term meta to the current timestamp
    • job_status - Set the term meta to the string completed.
  • is_complete() - This method will return a true if the job_completed_at meta is set, false if not.