Expose typestate variables #2726

Job	Run time
build_versions (stable)	1m 1s
Test	2m 5s
build_versions (beta)	3m 0s
Test	2m 34s
Test (charset)	1m 11s
cargo-deny (aarch64-apple-ios)	24s
build_versions (1.71.1)	20s
Test (charset)	1m 20s
Test (cookies)	1m 24s
cargo-deny (aarch64-linux-android)	36s
Test (socks-proxy)	1m 17s
Test (cookies)	1m 23s
Test (gzip)	1m 23s
cargo-deny (i686-pc-windows-gnu)	30s
Docs	1m 43s
Test (socks-proxy)	1m 21s
cargo-deny (i686-pc-windows-msvc)	26s
Test (gzip)	1m 0s
Test (brotli)	1m 19s
cargo-deny (i686-unknown-linux-gnu)	27s
Test (brotli)	1m 4s
Lint	53s
cargo-deny (wasm32-unknown-unknown)	33s
Test (json)	2m 9s
Test (json)	2m 4s
cargo-deny (x86_64-apple-darwin)	29s
Test (native-tls)	1m 31s
Test (native-tls)	1m 3s
cargo-deny (x86_64-apple-ios)	37s
Test (rustls-no-provider)	1m 30s
cargo-deny (x86_64-pc-windows-gnu)	21s
cargo-deny (x86_64-pc-windows-msvc)	38s
cargo-deny (x86_64-unknown-linux-gnu)	37s
cargo-deny (x86_64-unknown-redox)	33s
	38m 46s

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