Further harden the `deserialize()` function and the `Input` class (see #6724)
Update the language files
Bump the version number
Merge branch 'hotfix/3.2.6'
Fix another weakness in the `Input` class and further harden the `deserialize()` function

Fix another weakness in the `Input` class and further harden the `deserialize()` function. Thanks to Martin Auswöger for his input.
Bump the version number
Merge branch 'hotfix/3.2.7'
Merge pull request #1 from contao/master

3.2.5>3.2.7