Rust

Add MSRV minimal versions in CI #272

Job	Run time
Style Check (clippy)	53s
Code Coverage (stable/ubuntu-latest)	3m 36s
Verify MSRV	1m 1s
README Format Check	1m 12s
Integration Tests (Rust Stable with curl-client)	51s
Style Checks (rustfmt)	14s
Integration Tests (Rust Stable with h1-client)	44s
Unit and Doc Tests (Rust Stable on ubuntu-latest)	18s
Unit and Doc Tests (Rust Stable on windows-latest)	1m 10s
Integration Tests (Rust Stable with h1-client-rustls)	59s
Unit and Doc Tests (Rust Stable on macOS-latest)	20s
Integration Tests (Rust Stable with hyper-client)	51s
Unit and Doc Tests (Rust Beta on ubuntu-latest)	25s
Integration Tests (Rust Stable with reqwest-client-rustls)	44s
Unit and Doc Tests (Rust Beta on windows-latest)	58s
Integration Tests (Rust Stable with reqwest-client-native-tls)	28s
Unit and Doc Tests (Rust Beta on macOS-latest)	26s
Integration Tests (Rust Stable with reqwest-client-native-tls-vendored)	1m 57s
Unit and Doc Tests (Rust Nightly on ubuntu-latest)	18s
Unit and Doc Tests (Rust Nightly on windows-latest)	1m 26s
Unit and Doc Tests (Rust Nightly on macOS-latest)	24s
pages	0s
	19m 15s

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