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`Case2` → package to convert case with full Unicode support

Case2 is a drop-in replacement for Recase supporting Unicode Default Identifiers.

iex> Case2.to_snake "foo_barBaz-λambdaΛambda-привет-Мир"
#⇒ "foo_bar_baz_λambda_λambda_привет_мир"

iex> Case2.to_camel "foo_barBaz-λambdaΛambda-привет-Мир"
#⇒ "fooBarBazΛambdaΛambdaПриветМир"