[4.4] Update phpseclib to 3.0.34

[SniperSister]

Summary of Changes

Update phpseclib to 3.0.34 to fix https://nvd.nist.gov/vuln/detail/CVE-2023-49316.

Testing Instructions

Code review.

[richard67]

This will also fix issue #42142 . See also my PR #42190 for that issue, which I've just closed in favour of this one here.

[richard67]

I have tested this item ✅ successfully on a518908

Tested by code review + verified that the URL is correct.

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/42470.}

[rdeutz]

Shouldn't we have also an update for composer.json, we have still "phpseclib/bcmath_compat": "^2.0.1"

[SniperSister]

How is bcmath related to the PR @rdeutz ?

[richard67]

@SniperSister Meanwhile there is a new release 3.0.35 available. Changelog see https://github.com/phpseclib/phpseclib/releases/tag/3.0.35 . Would it make sense to update this PR to that release?

[SniperSister]

@richard67 as we have updated to 3.0.34 in the 5.x branch I would suggest we do the same here.

[MacJoom]

Thank you!