[TASK] Block web access to *.tsconfig files

Resolves: #85738
Releases: master, 8.7
Change-Id: I824cdce7c08e5390eafb654e2066b8f61db3c0ac
Reviewed-on: https://review.typo3.org/57788


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>