Lower package size as described when checking package

[bunop]

Is your feature request related to a problem? Please describe.
Running devtools::check(args = c('--as-cran')) raise a NOTE on package size, since the compiled version of this package and the test size is near to the 5Mb limit

Describe the solution you'd like
detectRUNS should have a smaller test size, or test files could be compressed and extracted for test (an for documentation). Or we can try to support the binary versions of *.ped files

Describe alternatives you've considered
Example data could be moved in a R data-only package data, however putting all the things in the same package will be easier for a user point of view

Additional context
Package size is near to 5Mb limit, not all builds raise this NOTE