@hackage normalization-insensitive2.0

The module Data.Unicode.NormalizationInsensitive provides the NI type constructor which can be parameterized by a string-like type like: String, ByteString, Text, etc.. Comparisons of values of the resulting type will be insensitive to normalization. This is very similar in spirit to the case-insensitive package, and is in fact based on the same code.