Allow "resize strategy" to be set on the resize detector

[chadian]

Currently as a proof-of-concept this addon is using the default resize strategy provided by element-resize-detector. For different reasons it may be desirable to specify this and therefore should be a way to pass in the strategy preference.

[chadian]

This should ultimately go along with #2 where the detector that is registered is also considered with any options for that detector. Currently, the element-resize-detector method has been dropped in favour of a native ResizeObserver example with a detector adapter. A detector adapter could be written as an example to bring back element-resize-detector as a method for detecting changes.