Bump dplyr dependency + make some tests pass on minimum of dplyr range

We need dplyr >= 1.0.8 for some dplyr_col_modify or something of the sort, used
by the column modifications recorder used by epi_archive.

(We also needed a more recent dplyr for if_any and if_all.)

Change some tests to actually run under dplyr 1.0.8, which was more rigid about
the types of things going into if_else.

Author: brookslogan

DESCRIPTION

@@ -29,7 +29,7 @@ Imports:
     checkmate,
     cli,
     data.table,
-    dplyr (>= 1.0.0),
+    dplyr (>= 1.0.8),
     genlasso,
     ggplot2,
     lifecycle (>= 1.0.1),

tests/testthat/test-epi_slide.R

@@ -434,7 +434,7 @@ test_that("`ref_time_values` + `all_rows = TRUE` works", {
     ),
     basic_full_result %>%
       dplyr::mutate(slide_value = dplyr::if_else(time_value %in% (test_date + c(2L, 8L)),
-        slide_value, NA_integer_
+        slide_value, NA_real_ # (`^` outputs numeric)
       ))
   )
 
@@ -472,7 +472,7 @@ test_that("`ref_time_values` + `all_rows = TRUE` works", {
       ),
     basic_mean_result %>%
       dplyr::mutate(slide_value_value = dplyr::if_else(time_value %in% (test_date + c(2L, 8L)),
-        slide_value, NA_integer_
+        slide_value, NA_real_
       )) %>%
       select(-slide_value)
   )
@@ -498,7 +498,7 @@ test_that("`ref_time_values` + `all_rows = TRUE` works", {
     ),
     basic_full_result %>%
       dplyr::mutate(slide_value = dplyr::if_else(time_value %in% (test_date + c(2L, 8L)),
-        slide_value, NA_integer_
+        slide_value, NA_real_
       )) %>%
       dplyr::rename(slide_value_value = slide_value)
   )
@@ -584,7 +584,7 @@ test_that("`ref_time_values` + `all_rows = TRUE` works", {
       unnest(slide_value, names_sep = "_"),
     basic_full_result %>%
       dplyr::mutate(slide_value = dplyr::if_else(time_value %in% (test_date + c(2L, 8L)),
-        slide_value, NA_integer_
+        slide_value, NA_real_
       )) %>%
       dplyr::rename(slide_value_value = slide_value)
   )