Changes in version 1.4 (2026-05-12)                   

  - Converted all legacy function documentation to roxygen2.
  - EL.statistic() now returns an object of class "htest".
  - Added FDEL.acf() for frequency-domain EL test of autocorrelation
    differences.
  - Fixed axis label issues in EL.plot() and updated examples.
  - Renamed d to Delta in EL.statistic() to align with theoretical
    notation; d is retained as a deprecated alias for backward
    compatibility.