<!-- ⚠️ If you do not respect this template, your issue will be closed --> <!-- ⚠️ Make sure to browse the opened and closed issues to confirm this idea does not exist. --> ### What is the expected behavior? <!-- Please, provide a clear and concise description of the expected behavior for this feature. --> Add a new _adaptive_ `PolynomialExtrapolator` class for performing Richardson extrapolation.
What is the expected behavior?
Add a new adaptive
PolynomialExtrapolatorclass for performing Richardson extrapolation.