Rust

Add MSRV minimal versions in CI #273

Job	Run time
Style Check (clippy)	53s
Code Coverage (stable/ubuntu-latest)	2m 4s
Verify MSRV	10s
Integration Tests (Rust Stable with curl-client)	55s
Integration Tests (Rust Stable with h1-client)	47s
README Format Check	1m 14s
Style Checks (rustfmt)	12s
Integration Tests (Rust Stable with h1-client-rustls)	53s
Integration Tests (Rust Stable with hyper-client)	44s
Unit and Doc Tests (Rust Stable on ubuntu-latest)	31s
Integration Tests (Rust Stable with reqwest-client-rustls)	43s
Unit and Doc Tests (Rust Stable on windows-latest)	1m 28s
Integration Tests (Rust Stable with reqwest-client-native-tls)	43s
Unit and Doc Tests (Rust Stable on macOS-latest)	27s
Integration Tests (Rust Stable with reqwest-client-native-tls-vendored)	1m 42s
Unit and Doc Tests (Rust Beta on ubuntu-latest)	24s
Unit and Doc Tests (Rust Beta on windows-latest)	1m 12s
Unit and Doc Tests (Rust Beta on macOS-latest)	29s
Unit and Doc Tests (Rust Nightly on ubuntu-latest)	24s
Unit and Doc Tests (Rust Nightly on windows-latest)	1m 11s
Unit and Doc Tests (Rust Nightly on macOS-latest)	25s
pages	1s
	17m 32s

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