Changes in version 0.1.9 (2024-02-01)                  

  - Fixed the problems in CRAN checks

                 Changes in version 0.1.8 (2023-09-04)                  

  - Updated reference list.

                 Changes in version 0.1.7 (2023-01-06)                  

  - Fixed errors.
  - Updated reference list.

                 Changes in version 0.1.6 (2022-12-21)                  

  - Fixed minors and errors.
  - Updated source functions and examples.
  - Updated reference list.
  - Updated author list.

                 Changes in version 0.1.5 (2021-09-14)                  

  - Fixed the error in CRAN package check results.
  - Updated maintainer's contact information.
  - The paper about the methods in the package has been submitted to
    arXiv and it has been included in the reference list in
    springer-package.R.