larmarange/labelled: labelled 2.8.0

new helper recode_if() for recoding values based on condition, variable and value labels being preserved (#82) look_for() could be time consuming for big data frames. Now, by default, only basic details of each variable are computed. You can compute all details with details = "full" (#77) printing of look_for() results has been updated and do not rely anymore on pillar (#85) to_labelled() can properly manage factors whose levels are coded as "[code] level", as produced by to_factor(levels = "prefixed") (#74 @courtiol) new function is_prefixed() to check if a factor is prefixed bug fix for na_range<- and na_values<- when applied to a data.frame (#80