dark-peak-analytics/assertHE: assertHE 1.0.1

Fixes issue arising from dplyr updates. dplyr recently removed dplyr::location(). assertHE referenced a column named location but does not note this as a global variable with utils::globalVariables("location") which did not cause an issue because dplyr was exporting a function with the same name location(). Unifies coverage percentage where test location/folder is NA.