Add JS::Object#apply method to call JS function without receiver
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This method is similar to `JS::Object#call`, but it is used to call a function that is not a method of an object. ```ruby floor = JS.global[:Math][:floor] floor.apply(3.14) # => 3 JS.global[:Promise].new do |resolve, reject| resolve.apply(42) end.await # => 42 ```
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This method is similar to
JS::Object#call, but it is used to call a function that is not a method of an object.