Register with "Type: project" in Packagist

[weierophinney]

The zfcampus/zf-apigility-skeleton package misses the "Type: project" attribute in Packagist:
https://packagist.org/packages/zendframework/skeleton-application

See the difference with the zendframework/zend-expressive-skeleton, which has this attribute:
https://packagist.org/packages/zendframework/zend-expressive-skeleton

As a result the Packagist API is query with filtering by project type then the Apigility Skeleton does not appear in the result list. Example query: https://packagist.org/search.json?q=zf-apigility-skeleton&type=project

In addition, the type in composer.json is set to "library", which also seems incorrect: https://github.com/zfcampus/zf-apigility-skeleton/blob/master/composer.json#L4

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Originally posted by @kaloyan-raev at zfcampus/zf-apigility-skeleton#152