Offer normalizenames?

[nilshg]

I often find myself doing:

df = DataFrame(XLSX.readtable("myfile.xlsx", 1))

# Realize column names are whacky

using CSV

rename!(df, CSV.normalizenames(names(df)))

Which isn't too much hassle but I was wondering whether we should just copy over those seven lines:

normalizename(name::Symbol) = name
function normalizename(name::String)::Symbol
    uname = strip(Unicode.normalize(name))
    id = Base.isidentifier(uname) ? uname : map(c->Base.is_id_char(c) ? c : '_', uname)
    cleansed = string((isempty(id) || !Base.is_id_start_char(id[1]) || id in RESERVED) ? "_" : "", id)
    return Symbol(replace(cleansed, r"(_)\1+"=>"_"))
end

to somewhere in XLSX.jl and expose a keyword?