Fixed the underFlow bug in src/binarySearch.sol #163

	name: AutoPrettier

	# Controls when the workflow will run
	on: [push, pull_request]

	jobs:
	autoprettier:
	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@v2
	- uses: actions/setup-node@v2
	with:
	node-version: 14

	# Runs a single command using the runners shell
	- name: Install
	run: \|
	npm install
	npm install --save-dev prettier prettier-plugin-solidity
	# Runs a set of commands using the runners shell
	- name: Execute Prettier
	run: npx prettier --write .

	# Commit formated files
	- name: Check for modified files
	id: git-check
	run: \|
	git config --global user.name 'autoprettier'
	git config --global user.email '[email protected]'
	echo ::set-output name=modified::$(if git diff-index --quiet HEAD --; then echo "false"; else echo "true"; fi)
	- name: Commit if any changes.
	if: steps.git-check.outputs.modified == 'true'
	run: \|
	git commit -am "🎨 Format Solidity code with Prettier"
	git push --force origin HEAD:$GITHUB_REF \|\| true

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