Enhancement: Normalize composer.json

[localheinz]

This PR

• requires localheinz/composer-normalize
• runs composer normalize --dry-run on Travis
• normalizes composer.json

💁‍♂️ For reference, see

• https://github.com/localheinz/composer-normalize
• https://localheinz.com/blog/2018/01/15/normalizing-composer.json/

[derrabus]

If we take that road, I'd suggest to make sure that composer files remain normalized. I have opened a feature request ergebnis/composer-normalize#29 for that purpose.

[localheinz]

@derrabus

Because of ergebnis/composer-normalize#30 I require php:^7.1, so for now we can't use localheinz/composer-normalize as a direct development dependency, unless we drop support for PHP 7.0.

[derrabus]

@localheinz I see. But you could do the validation on the php 7.1 Travis run only.

[chartjes]

👍

[chartjes]

Thanks @localheinz and @derrabus

[localheinz]

Thank you, @chartjes!