Why is node package not updated to the latest version?

Question

Node.js

Hello everyone,

I'm trying to update some packages in the project (frontend) to the latest version: I do
request 2.88.2
postcss 6.0.23

, for example, using the second
npm update
npm i --save [email protected]

+ [email protected]
updated 1 package in 12.5s

103 packages are looking for funding
  run `npm fund` for details

everything seems to be updated, but the npm list command still shows the presence of a previous version - perhaps it is used in some other package, as a dependency? Is it possible to find everything and update the parent packages or forcibly prescribe the version so that there is no previous version 6.0.23 at all?

all the best,
Vadim