Fix composer.json validation

[j0k3r]

See https://getcomposer.org/doc/04-schema.md for details on the schema

• The version field is present, it is recommended to leave it out if the package is published on Packagist.
• require.phpzip/phpzip : unbound version constraints (>=2.0.7) should be avoided
• require.grandt/phpresizegif : unbound version constraints (>=1.0.4) should be avoided
• require.grandt/relativepath : unbound version constraints (>=1.0.1) should be avoided

Also grandt/phpresizegif version 1.0.4 doesn't exist.

[Grandt]

I can see the problems with the unbound versions, but why remove the package version (4.0.6) ?

[j0k3r]

This is explained here.

[Grandt]

Got it. Thanks. Merged.

[j0k3r]

✌️