deriving Typeable is obsolete since GHC 7.10

I suppose `Typeable` can be removed from the list:
```
Data/Unicode/Types.hs:98:33: warning: [GHC-90584] [-Wderiving-typeable]
    • Deriving ‘Typeable’ has no effect: all types now auto-derive Typeable
    • In the data type declaration for ‘NormalizationMode’
   |
98 |       deriving (Eq, Show, Enum, Typeable)
   |                                 ^^^^^^^^
```