Merge branch 'development'
Bump to pango 1.50
Only upload Sources
Update for pango-1.48.4
Make this build again with Pango 1.48: s/gpointer/UnsafeMutablePointer<PangoEngineShape>/ s/gpointer/UnsafeMutablePointer<PangoEngineLang>/
Elaborate more on changes and fix some minor nitpicks
Note Swift 5.2 requirement
Add BUILD_DIR support
Update for Swift 5.2.4