refactor: DatRange throws exception if start > end #66

	# Automates the process of testing, analyzing, checking the code format,
	# building, and deploying using Github Actions.
	name: Flutter CI

	# Controls when the action will run.
	on:
	# Triggers the workflow on push or pull request events but only for the main branch
	push:
	branches: [master]
	pull_request:

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	# This workflow contains a single job called "build"
	build:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest

	# Steps represent a sequence of tasks that will be executed as part of the job
	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- uses: actions/checkout@v3
	# Java environment.
	- uses: actions/setup-java@v3
	with:
	distribution: 'zulu'
	java-version: '12.x'
	# Setup the flutter environment.
	- uses: subosito/flutter-action@v2
	with:
	flutter-version: "3.13.9"
	channel: 'stable'
	cache: true
	# Get flutter dependencies.
	- run: flutter pub get
	# Check for any formatting issues in the code.
	- run: dart format --set-exit-if-changed lib/ test/
	# Statically analyze the Dart code for any errors.
	- run: flutter analyze --no-current-package lib/ test/
	# Run widget tests for our flutter project.
	- run: flutter test --no-pub --coverage
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v3
	with:
	token: ${{ secrets.CODECOV_TOKEN }}
	file: ./coverage/lcov.info

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