Added table inheritance - $table->inherits('name')

[deadem]

Added postgresql table inheritance feature.

Using:

Schema::create('test', function ($table) {
    $table->string('name');
});

Schema::create('subtest', function ($table) {
    $table->string('text');
    $table->inherits('test');
});

Now table subtest inherited from test table and have both name and text fields.