Add lints for S/MIME BR 7.1.2.3.b #3740

	name: integration-test
	on:
	push:
	pull_request:
	schedule:
	# Run every 12 hours, at the 15 minute mark. E.g.
	# 2020-11-29 00:15:00 UTC, 2020-11-29 12:15:00 UTC, 2020-11-30 00:15:00 UTC
	- cron: '15 /12 * *'
	jobs:
	test:
	name: Integration Tests
	runs-on: ubuntu-latest
	steps:

	- name: Set up Go
	uses: actions/setup-go@v2
	with:
	go-version: ^1.18

	- name: Check out code
	uses: actions/checkout@v2

	- name: Check for cached integration corpus
	uses: actions/cache@v2
	with:
	path: v3/data
	key: ${{ runner.os }}-${{ hashFiles('v3/integration/**') }}

	- name: Run integration tests
	run: make integration PARALLELISM=3
	working-directory: v3

	- name: Run custom code linters
	run: make custom-code-lint
	working-directory: v3

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