fix: fix RLConv order

Author: alexfikl

pycaputo/quadrature/riemann_liouville.py

@@ -476,7 +476,8 @@ def name(self) -> str:
 
     @property
     def order(self) -> float:
-        return self.d.order
+        # FIXME: this is not the corect order!
+        return min(1.0, -self.d.order)
 
 
 @quad.register(RiemannLiouvilleConvolutionMethod)