v0.13.0

Additions

• Added Font, FontMetrics, Language, and Context.load_font(). #55, #58, #59

Internal Improvements

• Added .readthedocs.yaml for generating documentation. #54
• Updated c-definition generation script for Pango CFFI. #55
• Added tests. #58, #59
• Fixed GitHub actions. #57
  • Codecov now requires a token.
  • The libraries for cairo, pango, and glib were no longer working for macOS.