Adds export for link_reference_definition_syntax.dart #473

	# Run a smoke test against package:flutter_markdown.

	name: flutter_markdown

	on:
	schedule:
	# “At 00:00 (UTC) on Sunday.”
	- cron: '0 0 * * 0'
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	permissions: read-all

	jobs:
	smoke-test:
	runs-on: ubuntu-latest

	steps:
	- name: clone dart-lang/markdown
	uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
	with:
	repository: dart-lang/markdown
	path: markdown

	- name: clone flutter/packages
	uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
	with:
	repository: flutter/packages
	path: flutter_packages

	# Install the Flutter SDK using the subosito/flutter-action GitHub action.
	- name: install the flutter sdk
	uses: subosito/flutter-action@44ac965b96f18d999802d4b807e3256d5a3f9fa1
	with:
	channel: 'beta'

	- name: flutter --version
	run: flutter --version

	- name: create pubspec_overrides.yaml
	working-directory: flutter_packages/packages/flutter_markdown
	run: \|
	echo "dependency_overrides:" > pubspec_overrides.yaml
	echo " markdown:" >> pubspec_overrides.yaml
	echo " path: ../../../markdown" >> pubspec_overrides.yaml

	- name: flutter pub get
	working-directory: flutter_packages/packages/flutter_markdown
	run: flutter pub get

	- name: flutter analyze package:flutter_markdown
	working-directory: flutter_packages/packages/flutter_markdown
	run: flutter analyze

	- name: flutter test package:flutter_markdown
	working-directory: flutter_packages/packages/flutter_markdown
	run: flutter test

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