Rust

Add MSRV minimal versions in CI #267

Job	Run time
Unit and Doc Tests (Rust MSRV on ubuntu-latest)	1m 46s
Code Coverage (stable/ubuntu-latest)	3m 46s
Integration Tests (Rust Stable with curl-client)	52s
Unit and Doc Tests (Rust MSRV on windows-latest)	2m 34s
Style Check (clippy)	50s
Unit and Doc Tests (Rust MSRV on macOS-latest)	1m 24s
README Format Check	1m 10s
Integration Tests (Rust Stable with h1-client)	57s
Unit and Doc Tests (Rust Stable on ubuntu-latest)	36s
Style Checks (rustfmt)	13s
Unit and Doc Tests (Rust Stable on windows-latest)	2m 34s
Integration Tests (Rust Stable with h1-client-rustls)	1m 2s
Unit and Doc Tests (Rust Stable on macOS-latest)	20s
Integration Tests (Rust Stable with hyper-client)	55s
Unit and Doc Tests (Rust Beta on ubuntu-latest)	25s
Integration Tests (Rust Stable with reqwest-client-rustls)	42s
Unit and Doc Tests (Rust Beta on windows-latest)	58s
Integration Tests (Rust Stable with reqwest-client-native-tls)	29s
Unit and Doc Tests (Rust Beta on macOS-latest)	24s
Integration Tests (Rust Stable with reqwest-client-native-tls-vendored)	1m 44s
Unit and Doc Tests (Rust Nightly on ubuntu-latest)	19s
Unit and Doc Tests (Rust Nightly on windows-latest)	1m 39s
Unit and Doc Tests (Rust Nightly on macOS-latest)	25s
pages	0s
	26m 4s

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