Updating composer.json with more metadata
Merge branch 'release/1.3.1' of https://github.com/elliotchance/concise into 1.3.1/174-add-tags-for-packagist

Conflicts:
	composer.lock
Merge pull request #174 from elliotchance/1.3.1/174-add-tags-for-packagist

Add tags for packagist