Fix handling of html-tags in ToU and PP

[Crizz0]

Fixes #67

[battye]

That change makes sense to me, it looks good.

[battye]

For future reference, I asked about the v4 thing in the Symfony chatroom, here were some of the answers:

In my Symfony 4.4 project some packages also got updated to 5.x because they aren’t limited explicitly

if you want to limit symfony/debug to <4 you also need to add: "symfony/debug": "~3.0"

or add extra: {symfony: {require: 3.4.* }} into your composer.json file

[Crizz0]

Yes, that is my plan. I will revert the composer.lock change here. But we need to look at this later on. Am 9. November 2020 14:39:41 MEZ schrieb battye <[email protected]>:

…

@battye commented on this pull request. > }, { "name": "symfony/debug", - "version": "v3.4.36", + "version": "v4.4.15", @Crizz0 maybe the composer.lock change can be removed from the PR so that only the `LangKeyValidator.php` code change flows through? -- You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub: #68 (comment)

[Crizz0]

Mhm, like this is at the moment, the patch will break validation for phpBB 3.2.11 language packages.

So i added a if-sentence for this version to avoid this.