bug!: #130 correctly unquote filter_vars to shoosh warning

```r
#> Warning: Unquoting language objects with `!!!` is deprecated as of rlang 0.4.0. Please
#> use `!!` instead.
#>
#> # Bad: dplyr::select(data, !!!enquo(x))
#>
#> # Good: dplyr::select(data, !!enquo(x)) # Unquote single quosure
#> dplyr::select(data, !!!enquos(x)) # Splice list of quosures
```

R/generate_outlier_subsets.R

@@ -221,7 +221,7 @@ apply_slice_conditionally <- function(x, filter_vars){
                                  exclusion_set } 
                              else {"complete"}), {
     x %>%
-      filter(!!!filter_vars) %>%
+      filter(!!filter_vars) %>%
       mutate(data = 
                pmap(list(data, outcome_colname, n_min, n_max),
                     .f = ~ slice_conditionally(..1,