Fix minimum rust version mismatch in lib.rs #801

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	name: Continuous integration

	env:
	CARGO_TERM_COLOR: always
	HOST: x86_64-unknown-linux-gnu
	FEATURES: "test docs"
	RUSTFLAGS: "-D warnings"

	jobs:
	tests:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	rust:
	- stable
	- beta
	- nightly
	- 1.51.0 # MSRV

	steps:
	- uses: actions/checkout@v3
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ matrix.rust }}
	- uses: Swatinem/rust-cache@v2
	- name: Install openblas
	run: sudo apt-get install libopenblas-dev gfortran
	- run: ./scripts/all-tests.sh "$FEATURES" ${{ matrix.rust }}

	cross_test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	include:
	- rust: stable
	target: powerpc-unknown-linux-gnu
	- rust: stable
	target: i686-unknown-linux-gnu

	steps:
	- uses: actions/checkout@v3
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ matrix.rust }}
	targets: ${{ matrix.target }}
	- uses: Swatinem/rust-cache@v2
	- name: Install cross
	run: cargo install cross
	- run: ./scripts/cross-tests.sh "docs" ${{ matrix.rust }} ${{ matrix.target }}

	clippy:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	rust:
	- beta
	steps:
	- uses: actions/checkout@v3
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ matrix.rust }}
	components: clippy
	- uses: Swatinem/rust-cache@v2
	- run: cargo clippy --features docs

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