Changes in version 0.0.3 (2021-05-08)                  

  - Added valid.
  - Added a NEWS.md file to track changes to the package.
  - Edited vignette.

                 Changes in version 0.0.2 (2020-08-03)                  

  - Added a NEWS.md file to track changes to the package.
  - Description is fixed.

                        Changes in version 0.0.1                        

  - First submitted to cran.