Rust

Add MSRV minimal versions in CI #269

Job	Run time
Style Check (clippy)	51s
Code Coverage (stable/ubuntu-latest)	3m 37s
msrv	6m 42s
Integration Tests (Rust Stable with curl-client)	50s
README Format Check	1m 11s
Integration Tests (Rust Stable with h1-client)	45s
Style Checks (rustfmt)	12s
Integration Tests (Rust Stable with h1-client-rustls)	57s
Integration Tests (Rust Stable with hyper-client)	46s
Unit and Doc Tests (Rust Stable on ubuntu-latest)	36s
Integration Tests (Rust Stable with reqwest-client-rustls)	44s
Unit and Doc Tests (Rust Stable on windows-latest)	1m 2s
Integration Tests (Rust Stable with reqwest-client-native-tls)	42s
Unit and Doc Tests (Rust Stable on macOS-latest)	21s
Integration Tests (Rust Stable with reqwest-client-native-tls-vendored)	2m 11s
Unit and Doc Tests (Rust Beta on ubuntu-latest)	24s
Unit and Doc Tests (Rust Beta on windows-latest)	1m 24s
Unit and Doc Tests (Rust Beta on macOS-latest)	25s
Unit and Doc Tests (Rust Nightly on ubuntu-latest)	19s
Unit and Doc Tests (Rust Nightly on windows-latest)	1m 11s
Unit and Doc Tests (Rust Nightly on macOS-latest)	24s
pages	0s
	25m 34s

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