[BUG] sits_som_clean_samples() is not working as expected

[rolfsimoes]

Describe the bug
sits_som_clean_samples() should identify samples by clean, analyze, and remove and filter samples according to keep parameter.

To Reproduce

# create a som map
som_map <- sits_som_map(samples_modis_ndvi)
# clean the samples
new_samples <- sits_som_clean_samples(som_map)

If reporting a change from previous versions

Previous sits version is working.

Additional context
This occurs due to passing columns to an internal function. The current code removed .data from dplyr::mutate() which broke the code.