Libraries path is hardcoded to /vendor

[julpar]

On Deprecation#L129 it assumes vendor dir is always /vendor [1]. As per composer config [2] that behaviour can be changed. In a project i'm working on it happen to be this way:

    "config": {
        "vendor-dir": "libraries"
    },

Any chance that path can be fetched from config or specified on Deprecation::enableWithTriggerError();?

[1]
`

deprecations/lib/Doctrine/Deprecations/Deprecation.php

Line 129 in d12b335

$path = DIRECTORY_SEPARATOR . 'vendor' . DIRECTORY_SEPARATOR . $package . DIRECTORY_SEPARATOR;

[2] https://getcomposer.org/doc/06-config.md#vendor-dir

[greg0ire]

Related comment: #21 (comment)