[TASK] Update phpdocumentor/type-resolver from 0.2 to 0.2.1

Raising this indirect require-dev dependency fixes ~330
unit tests on PHP 7.2 that otherwise throw a count() on
non-array or countable warning.

Change-Id: I3dce8ffe6d2180bf41740b0bc5fd8397425cc985
Resolves: #83207
Releases: 7.6
Reviewed-on: https://review.typo3.org/54921


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>