Update generateAltText to set level as optional parameter #292

	name: CI

	on:
	pull_request:
	push:
	# Run CI on all branch pushes. Must use this syntax,
	# as we also need to run CI on tag pushes.
	branches:
	- "**"
	tags:
	- v[0-9]+.[0-9]+.[0-9]+*

	jobs:
	build:
	name: Build, lint, and publish
	runs-on: ubuntu-latest
	steps:
	- name: Check out the repository
	uses: actions/checkout@master
	with:
	fetch-depth: 0

	- name: Set up Node environment
	uses: actions/setup-node@v1
	with:
	node-version: '10.x'

	- name: Restore node_modules cache
	uses: actions/cache@v1
	id: multinetjs-cache
	with:
	path: /home/runner/work/multinetjs/multinetjs/node_modules
	key: ${{ runner.os }}-${{ hashFiles('/home/runner/work/multinetjs/multinetjs/yarn.lock') }}-multinetjs-cache

	- name: Install yarn packages
	if: steps.multinetjs-cache.outputs.cache-hit != 'true'
	run: yarn install

	- name: Run linting test
	run: yarn lint

	# TODO: Fix
	# - name: Run unit tests
	# run: yarn test

	- name: Create a production build
	run: yarn build

	- name: Get the publishing version number
	id: version-number
	run: echo "::set-output name=version::$(git describe --tags \| tail -c +2)"
	if: startsWith(github.ref, 'refs/tags/')

	- name: Publish the package
	run: yarn publish --new-version ${{ steps.version-number.outputs.version }} --non-interactive --no-git-tag-version
	env:
	NPM_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }}
	if: startsWith(github.ref, 'refs/tags/')

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