`summarise_long` fails when having latest version of vctrs installed.

[krystian8207]

Issue description

When having vctrs >= 0.4.1 installed using summarise_long on continuous data returns the following error:

Error: Can't merge the outer name `Q1` with a vector of length > 1.
Please supply a `.name_spec` specification.

Steps to reproduce the issue

t1_title <- "Cohort Summary"
t1_ds <- "ADaM Interim Dataset for Time-to-Event Analysis"
t1_fn <- "My table one footnote"

tbl_gt <-
  adtte %>%
  dplyr::filter(SAFFL == "Y") %>%
  dplyr::select(AGE, AGEGR1, SEX, EVNTDESC, TRTA) %>%
  visR::tableone(
    strata = "TRTA",
    overall = FALSE,
    title = t1_title,
    datasource = t1_ds,
    footnote = t1_fn,
    engine = "gt", 
    summary_function = summarize_long
  )

What's the expected result?

Generated tableone output in long format.

What's the actual result?

Error presented above.

Additional details / screenshot

This error is shown due to having nested names when computing quantiles with quantile function in visR:::summarize_long.numeric.
Removing the names fixes the error. I'll create a PR closing the issue soon.