Add square-root exercise #83

	name: Tests
	on:
	pull_request:
	push:
	branches:
	- main
	schedule:
	# Weekly.
	- cron: '0 0 * * 0'

	jobs:
	exercises:
	name: Check exercises
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
	- name: Install CoffeeScript
	run: npm install -g jasmine-node coffeescript
	- name: Run tests
	run: ./bin/test-exercises.sh

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