Add #66: Support KHR_draco_mesh_compression #484

Job	Run time
build_windows_deprecated_extensions	2m 58s
build_windows (NO)	2m 50s
build_linux_deprecated_extensions (gcc-9)	2m 17s
build_windows (YES)	3m 18s
build_linux (gcc-9, NO)	1m 55s
build_linux_deprecated_extensions (gcc-10)	2m 4s
build_linux_deprecated_extensions (clang-13)	2m 10s
build_linux (gcc-10, NO)	2m 1s
build_linux (gcc-10, YES)	2m 24s
build_linux (clang-13, NO)	2m 19s
build_linux (clang-15, NO)	2m 8s
build_linux (clang-15, YES)	2m 21s
	28m 45s

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