Adapt to go-perun v0.11.0 #85

	name: Go

	on:
	pull_request

	jobs:
	lint:
	name: Lint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/setup-go@v3
	with:
	go-version: 1.21
	- name: Checkout
	uses: actions/checkout@v3
	- name: golangci-lint
	uses: golangci/golangci-lint-action@v3
	with:
	version: v1.56.2

	test:
	name: Test
	runs-on: ubuntu-latest
	steps:
	- name: Setup Go
	uses: actions/setup-go@v2
	with:
	go-version: 1.21

	- name: Checkout
	uses: actions/checkout@v2

	- uses: actions/cache@v2
	with:
	path: \|
	~/.cache/go-build
	~/go/pkg/mod
	key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
	restore-keys: \|
	${{ runner.os }}-go-

	- name: Start Substrate node
	run: docker run --rm -d --name substrate -p 9944:9944 ghcr.io/perun-network/polkadot-test-node:0.4.0

	- name: Wait for Substrate node
	# Wait for port 9944 to listen.
	# https://github.com/marketplace/actions/wait-on did not work…
	run: timeout 25 bash -c "until nc -z 127.0.0.1 9944; do sleep 1; done"

	- name: Unit tests
	# Running the go tests with the `-p 1` flag is important, since the
	# tests otherwise are started in parallel and mess up the account nonce.
	run: go test -timeout 360s -p 1 ./...

	- name: Stop Substrate node
	run: docker stop substrate

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