Rust

Add MSRV minimal versions in CI #270

Job	Run time
Verify MSRV	1m 0s
Style Check (clippy)	57s
Code Coverage (stable/ubuntu-latest)	3m 47s
Integration Tests (Rust Stable with curl-client)	51s
README Format Check	1m 15s
Integration Tests (Rust Stable with h1-client)	47s
Integration Tests (Rust Stable with h1-client-rustls)	58s
Style Checks (rustfmt)	12s
Integration Tests (Rust Stable with hyper-client)	52s
Unit and Doc Tests (Rust Stable on ubuntu-latest)	18s
Integration Tests (Rust Stable with reqwest-client-rustls)	39s
Unit and Doc Tests (Rust Stable on windows-latest)	3m 17s
Integration Tests (Rust Stable with reqwest-client-native-tls)	55s
Unit and Doc Tests (Rust Stable on macOS-latest)	29s
Integration Tests (Rust Stable with reqwest-client-native-tls-vendored)	2m 11s
Unit and Doc Tests (Rust Beta on ubuntu-latest)	23s
Unit and Doc Tests (Rust Beta on windows-latest)	1m 13s
Unit and Doc Tests (Rust Beta on macOS-latest)	26s
Unit and Doc Tests (Rust Nightly on ubuntu-latest)	19s
Unit and Doc Tests (Rust Nightly on windows-latest)	53s
Unit and Doc Tests (Rust Nightly on macOS-latest)	28s
pages	0s
	22m 10s

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