Remove version limitations from phar assembly tool

[Ocramius]

See

BackwardCompatibilityCheck/build-phar.sh

Lines 7 to 9 in 5092098

	# lock PHP to minimum allowed version
	composer config platform.php 7.2.0
	composer update --no-dev

That is wrong, since:

1. we will run the phar assembly on the correct version
2. we shouldn't composer update, but rather composer install --no-dev
3. script should completely bail out in case of errors

[Ocramius]

As per #157 (comment), box should also be upgraded

[Ocramius]

Note: we should probably install box via composer, so we are always on latest stable.

[darenas31415]

Hi @Ocramius,

I've played with this a little bit.

Adding hambug/box to the main composer.json doesn't work after running composer install with --no-dev therefore moving the script to the build directory and creating a new composer.json there with only hambug/box.

I've seen other projects using bamarni/composer-bin-plugin to isolate and avoid conflicts on plugins.

Let me know if you prefer that approach, I can quickly make the changes and open a PR.

Thanks

[Ocramius]

Wouldn't a new tmp directory with composer require humbug/box work?

[darenas31415]

Yeah, that works perfectly and removes the composer.json boilerplate 👍