Property interpolation triggers misspelled properties warning

[sathomas]

&:before {
    margin-#{$property-y}: -2 * $hint-arrow-width;
}

Results in

warning  Property `margin-` appears to be spelled incorrectly  no-misspelled-properties

[DanPurdy]

Thanks for this @sathomas we'll get it sorted now that interpolation works in the AST correctly.

👍