required lidR version is now 4.1.1 (no more raster)

DESCRIPTION

@@ -20,7 +20,7 @@ Description: Provides functions for forest objects detection, structure metrics
 URL: https://lidar.pages.mia.inra.fr/lidaRtRee/, https://forgemia.inra.fr/lidar/lidaRtRee
 BugReports: https://forgemia.inra.fr/lidar/lidaRtRee/-/issues
 Depends: R (>= 4.0.0)
-Imports: graphics, stats, methods, grDevices, terra, sf, imager, leaps, gvlma, car, reldist, lidR (>= 4.0.0)
+Imports: graphics, stats, methods, grDevices, terra, sf, imager, leaps, gvlma, car, reldist, lidR (>= 4.1.1)
 Suggests: stars
 License: GPL-3
 LazyData: TRUE