fontique: Fix fontconfig->opentype extra black weight map #251

Job	Run time
cargo clippy (windows-latest)	2m 17s
cargo check (msrv) (android) (armv7-linux-androideabi)	47s
cargo check (msrv) (windows-latest)	2m 32s
cargo check (msrv) (android) (aarch64-linux-android)	45s
cargo clippy (macos-latest)	1m 7s
cargo clippy (android) (armv7-linux-androideabi)	1m 4s
cargo check (msrv) (macos-latest)	53s
cargo check (msrv) (android) (x86_64-linux-android)	49s
cargo clippy (ubuntu-latest)	1m 10s
cargo clippy (android) (aarch64-linux-android)	1m 2s
cargo check (msrv) (ubuntu-latest)	49s
cargo clippy (android) (x86_64-linux-android)	1m 3s
cargo doc (windows-latest)	1m 9s
cargo fmt	19s
cargo test (windows-latest)	1m 52s
cargo doc (macos-latest)	33s
typos	4s
cargo test (macos-latest)	44s
cargo doc (ubuntu-latest)	27s
cargo test (ubuntu-latest)	34s
	20m 0s

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