fix: Hide the xxx_sink variants from the public API (#123) #430

Job	Run time
Cross Build Only (x86_64-unknown-freebsd)	49s
Android Build Only (aarch64-linux-android)	1m 11s
Android Build Only (armv7-linux-androideabi)	1m 23s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	2m 0s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 26s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	1m 34s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	1m 44s
Cross Test (i686-unknown-linux-gnu)	1m 41s
check_semver	1m 36s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 57s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	1m 35s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 24s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	2m 2s
Checking docs	1m 4s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 10s
clippy_check	1m 43s
Minimal Supported Rust Version	1m 12s
Checking fmt	31s
codespell	9s
cargo deny	26s
	26m 37s

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