Pre push testsuites

[saidatom]

Q	A
Branch	master for features and deprecations
Bug fix?	no
New feature?	yes
Documented?	yes
Fixed tickets	#1135

It is an experiment to get the https://github.com/phpro/grumphp/issues/1135 working, actually there is the problem that if we have a grumphp.yml like that:

grumphp:
  process_timeout: 480
  tasks:
    phpcs:
      standard: PSR2
      ignore_patterns:
        - "spec/*Spec.php"
        - "test/*.php"
        - "stubs/*.php"
    phpspec:
      format: progress
      verbose: true
  testsuites:
    git_pre_push:
      tasks: [phpcs, phpspec]
  environment:
    paths:
      - tools

New Task Checklist:

• [ ] Is the doc/tasks.md file updated?
• [ ] Is the task registered in the tasks.yml file?
• [ ] Does the task contains phpunit tests?
• [ ] Does the task run in the correct context?
• [ ] Is the run() method readable?
• [ ] Is the run() method using the configuration correctly?
• [ ] Are all CI services returning green?