Substitute scoped functions

[raffaem]

Thanks for this uuseful package!

Don't you think we should replace scoped functions in the examples?

For instance:

# dplyr < 1.0
d <- filter_at(mtcars, vars(starts_with("d")), any_vars((. %% 2) == 0))

# 1.0 <= dplyr < 1.0.8
d <- filter(mtcars, rowSums(across(starts_with("d"), ~ .x %% 2 == 0))>0)

# dplyr >= 1.0.8
d <- filter(mtcars, if_any(starts_with("d"), ~ .x %% 2 == 0))

[elbersb]

sure, feel free to send a PR :)