Update to ehttp 0.4 #8648

Job	Run time
android	2m 12s
cargo-deny aarch64-apple-darwin	43s
cargo-deny aarch64-linux-android	42s
Check wasm32 + wasm-bindgen	3m 17s
cargo-deny i686-pc-windows-gnu	35s
cargo-deny i686-pc-windows-msvc	35s
Format + check + test	6m 28s
cargo-deny i686-unknown-linux-gnu	43s
cargo-deny wasm32-unknown-unknown	39s
cargo-deny x86_64-apple-darwin	44s
Check Windows	2m 51s
cargo-deny x86_64-pc-windows-gnu	39s
cargo-deny x86_64-pc-windows-msvc	39s
cargo-deny x86_64-unknown-linux-gnu	38s
cargo-deny x86_64-unknown-linux-musl	40s
cargo-deny x86_64-unknown-redox	39s
	22m 44s

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