feat: Add lockfile attestor #843

	# Copyright 2023 The Witness Contributors
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	# Dependency Review Action
	#
	# This Action will scan dependency manifest files that change as part of a Pull Request,
	# surfacing known-vulnerable versions of the packages declared or updated in the PR.
	# Once installed, if the workflow run is marked as required,
	# PRs introducing known-vulnerable packages will be blocked from merging.
	#
	# Source repository: https://github.com/actions/dependency-review-action
	name: 'Dependency Review'
	on: [pull_request]

	permissions:
	contents: read

	jobs:
	dependency-review:
	runs-on: ubuntu-latest
	steps:
	- name: Harden Runner
	uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
	with:
	egress-policy: audit

	- name: 'Checkout Repository'
	uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
	- name: 'Dependency Review'
	uses: actions/dependency-review-action@5a2ce3f5b92ee19cbb1541a4984c76d921601d7c # v4.3.4

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