BitterSC: Wrong small caps glyphs for some letters

[gustavkneustadt]

Thank you for the work on this project! :-)

This issue is not that important, since the small cap letters are included in the normal font files, but for the BitterSC files, there are some characters that are missing in some styles. By glancing over them I found that h, m and n are missing in ExtraBold and Black and ü, ö is missing for every italic style.

Thank you again!