php strategy should upgrade composer.lock hash if present

[Tbaile]

Hello!
When releasing a tag using release-please in a php project, the content-hash part of the composer.lock file is kept unchanged. This triggers warnings in composer due to the composer.json file may not be synced with the composer.lock.
This is a kink of composer, due to the fact that no other dependency manager that I know of does this (release please works like a breeze in nodejs projects).

I've looked up in the code and the only reasonable way to do this is adding an Update in the src/strategies/php.ts. But this cannot be done due to the fact that I need to change the composer.lock based off the now updated composer.json file, and the Update interface does not support multiple paths where to load the file from.

Any suggestions on how to implement this?