Fix a few clippy nits #1

	name: electrs

	on:
	push:
	pull_request:
	schedule:
	- cron: "0 0 * * *" # once a day

	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	strategy:
	matrix:
	build-args:
	[
	--locked --no-default-features,
	--locked,
	--locked --features metrics_process,
	]
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

	- name: Install rust
	uses: actions-rs/toolchain@v1
	with:
	components: rustfmt, clippy
	profile: minimal

	- name: Format
	uses: actions-rs/cargo@v1
	with:
	command: fmt
	args: --all -- --check

	- name: Build
	uses: actions-rs/cargo@v1
	with:
	command: build
	args: ${{ matrix.build-args }} --all

	- name: Test
	uses: actions-rs/cargo@v1
	with:
	command: test
	args: --locked --all

	- name: Clippy
	uses: actions-rs/cargo@v1
	with:
	command: clippy
	args: -- -D warnings

	integration:
	name: Integration
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Build
	run: docker build -f Dockerfile.ci . --rm -t electrs:tests
	- name: Test
	run: docker run -v $PWD/contrib/:/contrib -v $PWD/tests/:/tests --rm electrs:tests bash /tests/run.sh

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