Update to current `swash` 0.1.19 #325

Job	Run time
cargo clippy (android) (armv7-linux-androideabi)	2m 0s
cargo clippy (windows-latest)	37s
cargo check (msrv) (windows-latest)	3m 3s
cargo clippy (android) (aarch64-linux-android)	1m 58s
cargo clippy (macos-latest)	42s
cargo check (msrv) (android) (armv7-linux-androideabi)	1m 0s
cargo check (msrv) (macos-latest)	1m 34s
cargo clippy (android) (x86_64-linux-android)	1m 58s
cargo clippy (ubuntu-latest)	35s
cargo check (msrv) (android) (aarch64-linux-android)	1m 3s
cargo check (msrv) (ubuntu-latest)	1m 8s
cargo check (msrv) (android) (x86_64-linux-android)	1m 0s
cargo fmt	23s
cargo doc (windows-latest)	2m 44s
cargo test (windows-latest)	3m 40s
cargo doc (macos-latest)	57s
cargo test (macos-latest)	1m 44s
typos	6s
cargo doc (ubuntu-latest)	1m 5s
cargo test (ubuntu-latest)	1m 50s
	29m 7s

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