D:\webprojects\test-api-project>composer require zircote/swagger-php
Using version ^3.0 for zircote/swagger-php
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Restricting packages listed in "symfony/symfony" to "4.3.*"
Package operations: 1 install, 0 updates, 0 removals
  - Installing zircote/swagger-php (3.0.2): Downloading (100%)
Writing lock file
Generating autoload files
ocramius/package-versions: Generating version class...
ocramius/package-versions: ...done generating version class
Executing script cache:clear [OK]
Executing script assets:install public [OK]