Add support for `@method` tags

[cebe]

yiisoft/yii2-gii#90

Tagging along. Now I don't need to create new issue 👍
https://manual.phpdoc.org/HTMLSmartyConverter/PHP/phpDocumentor/tutorial_tags.method.pkg.html

[arogachev]

The support was already added in #192, I'll try to retest it.

[arogachev]

I'll describe new problems in new issues. The current issue seems to be a duplicate and already solved.