Recase.to_snake/1 is not consistent with previous versions (<0.4.0)

[rwngallego]

We have seen a compatibility break from versions 0.5.0+ in Recase.to_snake/1. This happens when there are multiple uppercase letters followed by lowercase ones as you can see in the example with "CurrencyISOCode":

Versions 0.5+

iex(2)> Recase.to_snake("CurrencyISOCode")
"currency_isocode"

Previos versions <= 0.4

iex(2)> Recase.to_snake("CurrencyISOCode")
"currency_iso_code"

Is that intended? For the moment we are pinning the dependency to v0.4.0

[Defcoun]

Please, add the ability to change every uppercase letters as in the my example:

iex(2)> Recase.to_snake("CurrencyISOCode") "currency_i_s_o_code"

[wkirschbaum]

Please, add the ability to change every uppercase letters as in the my example:

iex(2)> Recase.to_snake("CurrencyISOCode") "currency_i_s_o_code"

This is what I expected as well. The current handling of consecutive capitals does not make sense to me.

I would expect the latter example to convert back

iex(8)> Recase.to_snake("someRandomWord") |> Recase.to_camel()
"someRandomWord"
iex(9)> Recase.to_snake("someRANDOMWord") |> Recase.to_camel()
"someRandomword"

Which is useful when converting json objects between api's predictably.

[sobolevn]

PRs with different options are welcome! 👍