Deprecated use of SpecificationInterface on file collector

[jaapio]

Feature request

In version 2 of guides we will remove the support of the Flyfinder\Specification\SpecificationInterface in the creation of phpDocumentor\Guides\Handlers\ParseDirectoryCommand. We introduced a new phpDocumentor\FileSystem\Finder\Exclude that shall be used. This class is used to create the Flyfinder\Specification\SpecificationInterface in the FileCollector.

Users can upgrade using the Exclude class from v1.8.0