Replace locale_config

[leb-kuchen]

I think locale_config is abandoned . It uses the regex crate with all default features enabled for parsing locale. So there won't be any features for reducing compile times and binary sizes.
rust-locale/locale_config#13
rust-locale/locale_config#8

[kellpossible]

There's a potential to replace it with sys-locale as per #63 (comment) I'm open to any contributions to do so.

[eirnym]

I've made a hard fork https://github.com/eirtools/locale_config with various fixes

[kellpossible]

@eirnym thanks for letting us know!