per T311384, guzzle was updated to 7.4.5. However 1.37.3 is shipping with 7.4.1.
This has two problems
- We updated for a reason (There are mild security issues)
- composer.json says 7.4.5, but vendor/composer.lock says 7.4.1 (And the actual guzzle files are 7.4.1). This causes update.php to yell at users to run composer update, which is a bad user experience.
Originally reported at https://www.mediawiki.org/wiki/Topic:Wyl1cfgeh38lzb8o
I verified this on the 1.37.3 tarball.