Re: Upgrading php 5.6.x to 7.3 on CentOS 7 with Nginx and php-fpm

> What have I missed with the "yum update --noplugins"? Do I need some plugins?

One of the installed/enabled plugins block the update.
Usual suspect is priority, but seems this is another one.
perhaps "versionlock"

But again, only full yum output can give this information.

You really have to find which one, else you won't have benefit of next update (7.3.3, 7.3.4, ...)

Desktop: Fedora 29 x86_64 + rpmfusion + remi-test + remi-dev
Laptop:  Fedora 30 x86_64 + rpmfusion + remi (SCL only)
Hosting Server: CentOS 6.10 x86_64 with EPEL, remi, remi-php72 and remi-php72-test