Allow numeric as offsetDays

[schuemie]

Currently this throws an error:

fixedExit(offsetDays = 0)
# Error in validObject(.Object) : 
#   invalid class “FixedDurationExit” object: invalid object for slot "offsetDays" in class "FixedDurationExit": got class # "numeric", should be or extend class "integer"

which technically is correct, but would be nice if numeric is also allowed since R defaults all numbers to numeric.

[mdlavallee92]

adding a coercion to integer within the function. in the json serialization if the value is numeric I have seen it turn into a double so I force everything to be an integer to avoid that problem. Adding the fix in the develop branch for now and will push to main when I add a few updates to the vignettes. Will close this issue when it is merged into main

[mdlavallee92]

See adjustment here