Add support for Bzlmod #719

	# Copyright 2020 Google LLC
	#
	# 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
	#
	# https://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.
	#

	# Lint Bazel and BUILD files

	name: bazel_lint
	on:
	push:
	paths:
	- '**/BUILD'
	- '**.bzl'
	- '**/BUILD.bazel'
	pull_request:
	paths:
	- '**/BUILD'
	- '**.bzl'
	- '**/BUILD.bazel'
	jobs:
	bazel_lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v1
	- uses: actions/setup-go@v2
	with:
	go-version: '^1.13.1' # The Go version to download (if necessary) and use.
	- run: go install github.com/bazelbuild/buildtools/buildifier@latest
	- run: buildifier -lint=warn -mode=check $(find . -type f $ -name BUILD.bazel -or -name BUILD -or -name *.bzl $)

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