tests: Update and fix tests

.gitignore

 .history/
 
 # Directories that start with _
-_*/
+/_*/
 
 ## https://github.com/github/gitignore/blob/master/R.gitignore
 # History files

R/style_extra_css.R

   if (is.null(names(css))) {
     stop("All elements in `css` list must be named", call. = FALSE)
   }
-  if (purrr::vec_depth(css) != 3) {
+  if (purrr::pluck_depth(css) != 3) {
     stop(str_wrap(
       "`css` list must be a named list within a named list, e.g.:\n",
       '  list(".class-id" = list("css-property" = "value"))'

tests/testthat/_snaps/utils.md

+# printing google_font works
+
+    Code
+      google_font("Josefin Sans", "400", "400i", "600i", "700")
+    Output
+      Family:  Josefin Sans 
+      Weights: 400,400i,600i,700 
+      URL:     https://fonts.googleapis.com/css?family=Josefin+Sans:400,400i,600i,700&display=swap
+

tests/testthat/test-ggplot2.R

   expect_equal(res$after_set$line_colour, "#0088ff")
   expect_equal(res$after_set$bar_fill, "#FF8800")
   expect_equal(res$after_restore$line_colour, res$original$colour)
-  expect_equal(res$after_restore$bar_fill, res$original$fil)
+  expect_equal(res$after_restore$bar_fill, res$original$fill)
 })
 
 describe("theme_xaringan_get_value()", {