chore(test): fix embed test on php 8.4 (#396)

* chore(test): fix embed test on php 8.4

* docs: add comment explaining int param

---------

Co-authored-by: Xenira <1288524+Xenira@users.noreply.github.com>

Author: joelwurtz

src/embed/mod.rs

@@ -255,7 +255,7 @@ mod tests {
     #[test]
     #[should_panic]
     fn test_panic() {
-        Embed::run(|| {
+        Embed::run::<(), _>(|| {
             panic!("test panic");
         });
     }

tests/module.rs

@@ -2,6 +2,8 @@
 #![cfg(feature = "embed")]
 extern crate ext_php_rs;
 
+use cfg_if::cfg_if;
+
 use ext_php_rs::embed::Embed;
 use ext_php_rs::ffi::zend_register_module_ex;
 use ext_php_rs::prelude::*;
@@ -10,7 +12,14 @@ use ext_php_rs::prelude::*;
 fn test_module() {
     Embed::run(|| {
         // Allow to load the module
-        unsafe { zend_register_module_ex(get_module()) };
+        cfg_if! {
+            if #[cfg(php84)] {
+                // Register as temporary (2) module
+                unsafe { zend_register_module_ex(get_module(), 2) };
+            } else {
+                unsafe { zend_register_module_ex(get_module()) };
+            }
+        }
 
         let result = Embed::eval("$foo = hello_world('foo');");