Remove unused `gulp-exec` dependency #8

	name: CI
	on:
	push:
	branches: [master]
	pull_request:
	branches: [master]
	jobs:
	run:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	node: [8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21]
	steps:
	- name: Check out repository
	uses: actions/checkout@v4
	with:
	submodules: true

	- name: Set up Node.js
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node }}
	check-latest: true
	cache: npm

	- name: Install dependencies
	# Note: `npm ci` is faster and more reliable than `npm install` for CI,
	# but it is not compatible with older versions of Node.js that we still support.
	run: npm install

	- name: Run linter
	run: npx gulp lint

	- name: Run build
	run: npx gulp dist

	- name: Run tests
	run: npx gulp test karma

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