Add drupalci.yml to test for deprecations

Problem/Motivation

drupal-check results on commit hash: b6febee73bbf666e55ebf18f9bcb3e156d871b55

[OK] No errors

Proposed resolution

Add this drupalci.yml:

# This file customizes the steps that DrupalCI will use when testing this project.
#
# The primary customization provided here is to check for deprecation errors. It is recommended
# to do this only when you've used https://github.com/mglaman/drupal-check/ to verify any
# existing deprecation errors are addressed.
#
# Learn to make one for your own drupal.org project:
# https://www.drupal.org/drupalorg/docs/drupal-ci/customizing-drupalci-testing
build:
  assessment:
    validate_codebase:
      #phplint:
      #csslint:
        #halt-on-fail: false
      #eslint:
        # A test must pass eslinting standards check in order to continue processing.
        #halt-on-fail: true
      phpcs:
        # phpcs will use core's specified version of Coder.
        sniff-all-files: true
        halt-on-fail: false
    testing:
      # run_tests task is executed several times in order of performance speeds.
      # halt-on-fail can be set on the run_tests tasks in order to fail fast.
      # suppress-deprecations is false in order to be alerted to usages of
      # deprecated code.
      run_tests.standard:
        types: 'Simpletest,PHPUnit-Unit,PHPUnit-Kernel,PHPUnit-Functional'
        testgroups: '--all'
        suppress-deprecations: false
      #run_tests.js:
        #types: 'PHPUnit-FunctionalJavascript'
        #testgroups: '--all'
        #suppress-deprecations: false
      #nightwatchjs: {  }

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet