Bump github.com/attestantio/go-eth2-client from 0.19.8 to 0.21.1 #464

	name: Checks

	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	test:
	name: Test
	runs-on: ubuntu-latest
	steps:
	- name: Set up Go 1.x
	uses: actions/setup-go@v2
	with:
	go-version: ^1.20
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v2

	- name: Run unit tests and generate the coverage report
	run: make test

	lint:
	name: Lint
	runs-on: ubuntu-latest
	steps:
	- name: Set up Go 1.x
	uses: actions/setup-go@v2
	with:
	go-version: ^1.20
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v2

	- name: Install gofumpt
	run: go install mvdan.cc/gofumpt@latest

	- name: Install staticcheck
	run: go install honnef.co/go/tools/cmd/staticcheck@v0.4.3

	- name: Install golangci-lint
	run: go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.51.2

	- name: Lint
	run: make lint

	- name: Ensure go mod tidy runs without changes
	run: go mod tidy && git diff-index --quiet HEAD

	fuzz:
	name: Fuzz
	runs-on: ubuntu-latest
	steps:
	- name: Set up Go 1.x
	uses: actions/setup-go@v2
	with:
	go-version: ^1.20
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v2

	- name: Fuzz each test for one second
	run: TERM=xterm FUZZTIME=1s make fuzz

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