Docs: Add details on using other Github Actions to parse composer.json

[jasongill]

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name: ⚙ Improvement
about: Documentation updates to clarify how to use other Github Actions to read version details from composer.json
labels: enhancement

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Related discussion

#629, #713, #639 and likely others as this seems to be a common use case

Description

This is an update to the documentation which includes additional examples on how to use other packages in the Github Actions ecosystem to handle automatically setting the versions from composer.json. This should resolve discussions or questions about using composer.json with setup-php without adding any additional code at this time.

[shivammathur]

Thanks for contributing this, but as part of documentation I would not like to merge this.

If you can add these as a feature to the action to read the php version and extensions from composer.json I would be happy to merge that.

[jasongill]

Thanks for contributing this, but as part of documentation I would not like to merge this.

If you can add these as a feature to the action to read the php version and extensions from composer.json I would be happy to merge that.

Done! See #754 and thanks again for a very helpful project