Add a lexer, tests and examples for COBOL #619

	---
	name: CI

	on:
	push:
	# The `github-workflow-test` can be used to test changes without making a PR
	branches: [master, github-workflow-test]
	pull_request:
	branches: [master]

	jobs:
	linelint:
	name: Linelint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: fernandrone/linelint@master

	rubocop:
	name: RuboCop
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: "2.7"
	bundler-cache: true
	- name: Run RuboCop
	run: bundle exec rake check:style

	test:
	name: Test ${{ matrix.ruby-version }}
	runs-on: ubuntu-latest
	strategy:
	matrix:
	ruby-version: ["2.7", "3.0", "3.1", "3.2", "3.3"]

	steps:
	- uses: actions/checkout@v4
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby-version }}
	bundler-cache: true
	- name: Run tests
	run: bundle exec rake check:specs

	profile:
	name: Profile
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: "3.3"
	bundler-cache: true
	- name: Profile Memory Allocation
	run: bundle exec rake check:memory
	- name: Interpreter Warnings Test
	env:
	RUBYOPT: "-w"
	run: bundle exec rake check:specs

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