Changes in version 1.9.4 (2022-10-07)
+ re-added sehm for backward compatibility
+ meltSE moved to sechm
Changes in version 1.9.2 (2022-04-16)
+ removed functions that have been moved to the sechm package
Changes in version 1.5.3 (2021-04-19)
+ plotting functions moved to the `sechm' package
