Fixed clippy warnings and GitHib CI for MSRV v1.73 #13

	on: [push, pull_request]

	name: Continuous integration

	jobs:
	check:
	name: Check
	runs-on: ubuntu-latest
	strategy:
	matrix:
	rust:
	- stable
	- 1.73.0
	steps:
	- uses: actions/checkout@v2
	- uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: ${{ matrix.rust }}
	override: true
	- uses: actions-rs/cargo@v1
	with:
	command: check
	args: --all-targets

	# The tests currently won't work without the 'industrialio' and 'iio_dummy'
	# modules, loaded into the kernel.
	# Perhaps split out a default set of tests that don't hit the kernel and
	# enable this.

	# test:
	# name: Test Suite
	# runs-on: ubuntu-latest
	# strategy:
	# matrix:
	# rust:
	# - stable
	# - 1.73.0
	# steps:
	# - uses: actions/checkout@v2
	# - uses: actions-rs/toolchain@v1
	# with:
	# profile: minimal
	# toolchain: ${{ matrix.rust }}
	# override: true
	# - uses: actions-rs/cargo@v1
	# with:
	# command: test

	fmt:
	name: Rustfmt
	runs-on: ubuntu-latest
	strategy:
	matrix:
	rust:
	- nightly
	steps:
	- uses: actions/checkout@v2
	- uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: ${{ matrix.rust }}
	override: true
	- run: rustup component add rustfmt
	- uses: actions-rs/cargo@v1
	with:
	command: fmt
	args: --all -- --check

	clippy:
	name: Clippy
	runs-on: ubuntu-latest
	strategy:
	matrix:
	rust:
	- stable
	- 1.73.0
	steps:
	- uses: actions/checkout@v2
	- uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: ${{ matrix.rust }}
	override: true
	- run: rustup component add clippy
	- uses: actions-rs/cargo@v1
	with:
	command: clippy
	args: -- -D warnings

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