Broaden dependency bounds.

Finish testing the FontConfig bridges to FreeType & Harfbuzz!

Bugfixing regarding bridging over to Harfbuzz, exposing more FreeType info.

Start implementing a seperate bridge module to Harfbuzz.

Fix various segfaults & exercise bridging from FcPatterns to Ft_Faces.

Add rudimentary test suite.

Transliterates some of FontConfig's unittests to ensure the language bindings don't break things.
Could still be tested further.

Document FontConfig Strings & Weights bindings, utilize weight bindings for CSS bindings.

Document FcConfig language bindings, compile-fix exposing FontFaceParser.

Document FcRange bindings, expose FontFaceParser, & document LangResult enum.

Document FcLangSet language bindings.

Document FcCharSet language bindings.

Document FcValue language bindings.

Document FcObjectSet language bindings.

Document FreeType integration.

Document FcFontSet language bindings.

Document FcPattern language bindings.

Upload documentation on initialization/finalization routines.

Add API for dereferencing & rendering glyphs.

Transliterate FTFC into these FontConfig language bindings.

Expose convenience APIs for coercing values & pattern properties to a type.