Also fixes warning about mismatched composer.json hash (#10002)

Update dependencies
  - Updating symfony/var-dumper (v4.2.3 => v4.2.4)
  - Updating symfony/console (v4.2.3 => v4.2.4)
  - Updating symfony/debug (v4.2.3 => v4.2.4)
  - Updating nikic/php-parser (v4.2.0 => v4.2.1)
  - Updating symfony/css-selector (v4.2.3 => v4.2.4)
  - Updating symfony/routing (v4.2.3 => v4.2.4)
  - Updating symfony/process (v4.2.3 => v4.2.4)
  - Updating symfony/http-foundation (v4.2.3 => v4.2.4)
  - Updating symfony/event-dispatcher (v4.2.3 => v4.2.4)
  - Updating symfony/http-kernel (v4.2.3 => v4.2.4)
  - Updating symfony/finder (v4.2.3 => v4.2.4)
  - Installing symfony/polyfill-intl-idn (v1.10.0)
  - Installing symfony/polyfill-iconv (v1.10.0)
  - Updating swiftmailer/swiftmailer (v6.1.3 => v6.2.0)
  - Updating opis/closure (3.1.5 => 3.1.6)
  - Updating symfony/translation (v4.2.3 => v4.2.4)
  - Updating erusev/parsedown (1.7.1 => v1.7.2)
  - Updating laravel/framework (v5.7.26 => v5.7.28)
  - Updating nexmo/client (1.6.2 => 1.6.3)
  - Updating laravel/laravel (v5.7.19 => v5.7.28)
  - Updating symfony/yaml (v4.2.3 => v4.2.4)
  - Updating fico7489/laravel-pivot (3.0.0 => 3.0.1)
  - Updating barryvdh/laravel-debugbar (v3.2.2 => v3.2.3)
  - Updating symfony/filesystem (v4.2.3 => v4.2.4)
  - Updating barryvdh/laravel-ide-helper (v2.5.3 => v2.6.1)
  - Updating laravel/dusk (v5.0.0 => v5.0.2)
  - Updating phpunit/php-timer (2.0.0 => 2.1.1)
  - Updating phpunit/phpunit (7.5.4 => 7.5.7)
  - Updating symfony/dotenv (v3.4.22 => v3.4.23)