detached rulesets aren't imported when using reference option

[niallcampbell84]

Normal less variables import as expected, but detached rulesets don't import. For example

@import ( reference ) "_detached-rulesets-test.less"
@_my_detached_ruleset();
.test_normal_variables {
    margin: unit( @_normal_variable_test, px );
}

and in _detached-rulesets-test.less

@_normal_variable_test: 26;
@_my_detached_ruleset: {
    BODY {
        margin: 10px;
    }
}

this gives the output

.test_normal_variables {
    margin: 26px;
}

[mishal]

ILess produces the same ouput as less.js 2.5.3...
The latest less.js has this fixed.

the bug was fixed in less.js in 2.6.0 (see https://raw.githubusercontent.com/less/less.js/master/CHANGELOG.md)

This might be the less.js PR: less/less.js#2729

Any help on moving ILess forward would be very appreciated.