cairo: update type 3 fonts for cairo 1.18 api

Adrian Johnson requested to merge ajohnson/poppler:cairo-type3-color into master

IN the cairo 1.18.0 stable release the color font API has changed slightly from the 1.17.x development snapshots. The new cairo_user_scaled_font_get_foreground_marker() function needs to be called to set the foreground color.

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