Provides a custom header for objects of class tbl_release when printed.
Examples
df <- dplyr::filter(reviser::gdp, id == "US")
release_data <- get_nth_release(df, n = 0:3)
pillar::tbl_sum(release_data)
#> Vintages data (release format) Format
#> "" "long"
#> Time periods Releases
#> "179" "4"
#> IDs
#> "1"
