ucd2haskell tool used streamly library which version in cabal was out of date. It is updated to the latest version at hackage with deprecated parts rewritten.

Also following fixes were applied to existing code in suppose that from its last run the code structure was changed and now it was required to be up to date with actual folder structures:
1. Ghc module path environment got a suffix with `src`.
2. Generated code got
2.1 `GHC.Internal` prefix for `Data.*`.
2.2 `GHC.Unicode.Internal` swapped on `GHC.Internal.Unicode` according to actual structure.