Return 0/1 explicitly as the client expects it

t/ui/10-tests_overview.t was failing under perl 5.40:

    # Subtest: job dependencies displayed on 'Test result overview' page
        ok 1 - job href is shown correctly
        not ok 2 - dependency is shown correctly

        #   Failed test 'dependency is shown correctly'
        #   at t/ui/10-tests_overview.t line 594.
        #          got: '1 parallel parent
        # dependency failed'
        #     expected: '1 parallel parent
        # dependency passed'

In newer perl versions booleans are preserved, and when Mojolicious
sends JSON to the client, it will return it as true.
To support both older and newer versions, we explicitly return 0 or 1.

lib/OpenQA/Schema/Result/Jobs.pm

@@ -2233,7 +2233,7 @@ sub dependencies ($self, $children_list = undef, $parents_list = undef) {
         push(@{$children{$s->to_string}}, $s->child_job_id);
     }
 
-    return {parents => \%parents, has_parents => $has_parents, parents_ok => $parents_ok, children => \%children};
+    return {parents => \%parents, has_parents => $has_parents, parents_ok => ($parents_ok ? 1 : 0), children => \%children};
 }
 
 sub result_stats ($self) {