Update Composer dependencies (2020-06-23)

[danielbachhuber]

Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 21 updates, 0 removals
  - Updating symfony/polyfill-php80 (v1.17.0 => v1.17.1): Loading from cache
  - Updating symfony/event-dispatcher (v5.1.0 => v5.1.2): Loading from cache
  - Updating symfony/polyfill-ctype (v1.17.0 => v1.17.1): Loading from cache
  - Updating symfony/yaml (v5.1.0 => v5.1.2): Loading from cache
  - Updating symfony/filesystem (v5.1.0 => v5.1.2): Loading from cache
  - Updating symfony/config (v4.4.9 => v4.4.10): Loading from cache
  - Updating symfony/dependency-injection (v4.4.9 => v4.4.10): Loading from cache
  - Updating symfony/polyfill-mbstring (v1.17.0 => v1.17.1): Loading from cache
  - Updating symfony/polyfill-intl-normalizer (v1.17.0 => v1.17.1): Loading from cache
  - Updating symfony/polyfill-intl-grapheme (v1.17.0 => v1.17.1): Loading from cache
  - Updating symfony/string (v5.1.0 => v5.1.2): Loading from cache
  - Updating symfony/polyfill-php73 (v1.17.0 => v1.17.1): Loading from cache
  - Updating symfony/console (v5.1.0 => v5.1.2): Loading from cache
  - Updating symfony/translation (v4.4.9 => v4.4.10): Loading from cache
  - Updating symfony/css-selector (v5.1.0 => v5.1.2): Loading from cache
  - Updating symfony/dom-crawler (v4.4.9 => v4.4.10): Loading from cache
  - Updating symfony/browser-kit (v4.4.9 => v4.4.10): Loading from cache
  - Updating symfony/polyfill-intl-idn (v1.17.0 => v1.17.1): Loading from cache
  - Updating guzzlehttp/guzzle (6.5.4 => 6.5.5): Loading from cache
  - Updating phpdocumentor/type-resolver (1.1.0 => 1.2.0): Loading from cache
  - Updating webmozart/assert (1.8.0 => 1.9.0): Loading from cache
Writing lock file
Generating autoload files