Enhancement: Document platform requirement in composer.json

[localheinz]

This pull request

• documents the platform requirement in composer.json

Follows #606 (comment).

💁‍♂️ This project currently does not use composer to manage its dependencies, but it does not need to stay that way. Apart from using composer to manage dependencies, composer.json also serves documentation purposes. For a start, I propose to add composer.json with platform requirements - we can take it from there, if that make sense for you.

[localheinz]

Are there any objections to merging this pull request?

[kamil-tekiela]

Why is composer.lock committed?

[localheinz]

@kamil-tekiela

See https://naderman.de/slippy/slides/2018-01-26-composer-lock-demystified.pdf:

[cmb69]

I'm generally in favor of adding a composer.json, and if we declare config.platform.php, committing composer.lock appears to be a good idea as well.

[cmb69]

Thank you! This is fine for me.

[cmb69]

Thank you!

[localheinz]

Thank you, @carusogabriel, @cmb69, @Girgias, and @kamil-tekiela!