The inheritance of attribute options is broken

This example raises `Must have an is at...` exception because `is => 'rw'` from `Foo::foo` is not inherited:

```perl
package Foo;

use Moo;

has foo => (
    is => 'rw',
);

package Bar;

use Moo;
use MooX::Aliases;

extends 'Foo';

has '+foo' => (
    alias => 'bar',
);
```