Merge branch 'workplane_accepts_cq_plane' of https://github.com/fusio…

…n-energy/paramak into workplane_accepts_cq_plane

paramak/shape.py

@@ -279,7 +279,7 @@ def workplane(self, value):
         if not isinstance(value, Plane):
             if value in acceptable_values:
                 self._workplane = value
-            elif type(value) is str:
+            elif isinstance(value, str):
                 raise ValueError(
                     "Shape.workplane must be one of ",
                     acceptable_values,