Downgrade MSRV to 1.51
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@ -11,7 +11,7 @@ documentation = "https://docs.rs/tungstenite/0.17.2"
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repository = "https://github.com/snapview/tungstenite-rs"
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version = "0.17.2"
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edition = "2018"
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rust-version = "1.56"
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rust-version = "1.51"
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include = ["benches/**/*", "src/**/*", "LICENSE-*", "README.md", "CHANGELOG.md"]
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[package.metadata.docs.rs]
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@ -129,7 +129,7 @@ fn generate_request(mut request: Request) -> Result<(Vec<u8>, String)> {
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//
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// See similar problem in `hyper`: https://github.com/hyperium/hyper/issues/1492
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let headers = request.headers_mut();
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for header in WEBSOCKET_HEADERS {
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for &header in &WEBSOCKET_HEADERS {
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let value = headers.remove(header).ok_or_else(|| {
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Error::Protocol(ProtocolError::InvalidHeader(
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HeaderName::from_bytes(header.as_bytes()).unwrap(),
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