Add composer.json file for PHP dependency management. - This allows PHP projects that use Composer to include this project as a required dependency.
Add composer.json file for PHP dependency management.
- This allows PHP projects that use Composer to include this project as a required dependency.

Relequestual/JSON-Schema-Test-Suite,WHenderson/ex-json-schema,epoberezkin/JSON-Schema-Test-Suite,json-schema/JSON-Schema-Test-Suite,json-schema-org/JSON-Schema-Test-Suite,atomiqio/json-schema-test-suite,neomadara/JSON-Schema-Test-Suite,atomiqio/json-schema-test-suite,moander/JSON-Schema-Test-Suite,epoberezkin/JSON-Schema-Test-Suite,mafintosh/JSON-Schema-Test-Suite,WHenderson/ex-json-schema