Add is_countable() to NEWS/UPGRADING

Author: duncan3dc

NEWS

@@ -18,6 +18,7 @@ PHP                                                                        NEWS
     operation). (Dmitry)
   . Implemented FR #72768 (Add ENABLE_VIRTUAL_TERMINAL_PROCESSING flag for
     php.exe). (Michele Locati)
+  . Added is_countable() to check if the parameter is safe to pass to count(). (Craig Duncan)
 
 - Date:
   . Fixed bug #69587 (DateInterval properties and isset). (jhdxr)

UPGRADING

@@ -37,6 +37,7 @@ PHP 7.2 UPGRADE NOTES
   . Simplified password hashing API updated to support Argon2i hashes when PHP is compiled with libargon2
     (https://wiki.php.net/rfc/argon2_password_hash).
   . proc_nice() is now supported on Windows platforms.
+  . Added is_countable() to check if the parameter is safe to pass to count().
 
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 3. Changes in SAPI modules