v2.3.1 (2022-01-12) Add new format outputs for the `bump diff` command

🆕 diff command now accepts a --format argument

• The bump diff command now accepts a --format argument to be able to return three different format diff outputs:
  • text will return the current default format
  • markdown will return a markdown formatted diff
  • json will return a list of json objects with all the details of the diff