my $info = My::Config->new( Load( 'config.yaml' ));

# in My::Config
package My::Config 0.01 {
    use Moo 2;
    has 'include_files' => (
        is => 'lazy',
        default => sub { [] },
    );
};

# After update:
# in My::Config
package My::Config 0.01 {
    use Moo 2;
    has 'plugins' => (
        is => 'lazy',
        default => sub { [] },
    );
    has 'include_templates' => (
        is => 'lazy',
        default => sub { [] },
    );
};

##</code><code>##

$info = {
    include_files => [],
};