composer only updates automatic loading without updating dependencies

Added psr-4autoload in composer.json

Then execute composer update to load the added directory

When executing update, dependency packages will always be updated

How to do it Only update automatic loading without updating dependencies

--Supplement--

composer dump-autoload

Reply content:

Added psr-4autoload in composer.json

Then execute composer update to load the added directory

When executing update, dependency packages will always be updated

How to do it Only update automatic loading without updating dependencies

--Supplement--

composer dump-autoload