Upgrade to the `freetype-sys` 0.23.0 #247

Job	Run time
stable, Linux, static linking, no pkg-config	1m 51s
stable, Linux, shared library	1m 11s
stable, macOS, shared library	23s
stable, Windows, static library	53s
stable, Emscripten, static library	1m 20s
stable, iOS, static library	46s
stable, macOS, static library	39s
Result	0s
	7m 3s

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