Update dependency krakjoe/apcu to v5.1.20 (main)

[renovate]

This PR contains the following updates:

Package	Update	Change
krakjoe/apcu	patch	5.1.19 -> 5.1.20

---

Release Notes

krakjoe/apcu

v5.1.20

Compare Source

• Fix deadlocks when other apcu_* functions are used inside apcu_entry(). It should now be safe to use any functions inside the apcu_entry() callback.
• Fix division by zero exception in apc.php.
• Fix handling of references in PHP 8 if "default" serializer is used (which is not the default).
• Fix string reuse handling if "default" serializer is used (which is not the default).
• Check for failures when acquiring read locks to report problems earlier (write locks were already checked previously).
• Adjust tests for current PHP 8.1 development branch.
• Remove *_api.h headers. Use apc_cache.h instead of apc_cache_api.h etc.

---

Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box.

---

This PR has been generated by WhiteSource Renovate. View repository job log here.