Lint

Updates blueprint up to 4.8, install types, use pnpm instead of yarn and fixes modifier types #873

	name: Lint

	# based on:
	# - https://github.com/NullVoxPopuli/eslint-plugin-decorator-position/blob/master/.github/workflows/lint.yml
	# - https://github.com/NullVoxPopuli/ember-autostash-modifier/blob/master/.github/workflows/ci.yml
	# - https://github.com/emberjs/ember-test-helpers/blob/master/.github/workflows/ci-build.yml
	on:
	pull_request:
	push:
	# filtering branches here prevents duplicate builds from pull_request and push
	branches:
	- main

	env:
	CI: true

	jobs:
	source:
	if: "! contains(toJSON(github.event.commits.*.message), '[skip ci]')"
	name: Source
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	- uses: volta-cli/action@v1

	- run: yarn install --frozen-lockfile

	- name: ESLint
	run: yarn lint:js

	- name: Templates
	run: yarn lint:hbs


	# docs:
	# if: "! contains(toJSON(github.event.commits.*.message), '[skip ci]')"
	# name: Docs
	# runs-on: ubuntu-latest

	# steps:
	# - uses: actions/checkout@v2
	# - uses: volta-cli/action@v1

	# - run: yarn install
	# - run: yarn lint:docs


	# docs-js-code:
	# if: "! contains(toJSON(github.event.commits.*.message), '[skip ci]')"
	# name: Docs (JS Code Samples)
	# runs-on: ubuntu-latest

	# steps:
	# - uses: actions/checkout@v2
	# - uses: volta-cli/action@v1

	# - run: yarn install
	# - run: yarn lint:docs-js

	commits:
	if: "! contains(toJSON(github.event.commits.*.message), '[skip ci]')"
	name: Commit Messages
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- uses: volta-cli/action@v1
	- uses: wagoid/commitlint-github-action@v4.1.9

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