Add contact_space and nullable_type_declaration #55

	name: Lint
	on:
	push:
	branches:
	- master
	- stable*
	pull_request:

	jobs:
	lint-php:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Install Dependencies
	run: composer install --prefer-dist
	- name: Load problem matcher for php -l
	uses: korelstar/phplint-problem-matcher@v1
	- name: PHP syntax check
	run: "find src/ -type f -name '*.php' -print0 \| xargs -0 -L1 -P4 -- php -l -f"
	- name: PHP Coding Standards Fixer
	run: vendor/bin/php-cs-fixer fix --dry-run --diff

Provide feedback