Updating is highly recommended due to a bug fix!
For more information about added features, I refer to the issues on GitHub.
This is a short list of new stuff:

• A new tag <receiver> was added. This placeholder will be replaced by the name of the player that is receiving that message.
  
• A new tag <time> was added for sleep_delay. It will be substituted by the amount of time that players must 'sleep'.
• Support for singular/plural nouns has been added. No more awkward phrasing like "1 more player(s) need to sleep". This can be achieved by using [singular.plural] in lang.yml. A tutorial is included, so either reset lang.yml by deleting it (and restarting or /bs reload) or check out the default lang.yml!
• A bug, introduced in 2.0.0, was fixed. This bug would unintentionally unregister several events of other plugins. Which could also cause configuration of other plugins to be faulty until reload. This bug would occur opon /bs reload.

Thank you, @ johnmon264 for your bug report and suggestions!