Unicode characters in library names

[higepon]

Context: https://gitlab.com/akkuscm/akku/-/issues/66#note_1186957663

[higepon]

We keep this open until we release the next RC.
Draft for akku author.

The issue was fixed in #239. As you can seen in we followed what Ikarus is doing https://github.com/higepon/mosh/pull/239/files.