Do not use internal packages to connect builder signals.

Satisfy missing import in generated pangoft2.

Generate (nearly empty) freetype2 lib, which is referenced
from pangoft2.

The other option might be to not generate pangoft2, as it doesn't
offer very much.

Provide support for gdk.Event.

Add go version to go.mod.

Add support for bitfield/enum types as out params.

Improve docs, with minor corrections and additions.

Remove unnecessary dependency on glib 2.32 or later.

Draw some text in the custom drawing example.

Add a note about glib.IdleAddOnce in documentation.

Generate FontMetrics type and its methods.