Fix error when using VFadeIn (and its subclasses) (#2328)

* Fix error when using VFadeIn and its subclasses

* add np.floating in type checking of Mobject.set_rgba_array_by_color and VMobject.set_stroke and removing the change in VFadeIn

Author: irvanalhaq9

manimlib/mobject/mobject.py

@@ -1361,7 +1361,7 @@ def set_rgba_array_by_color(
                     rgbs = resize_with_interpolation(rgbs, len(data))
                 data[name][:, :3] = rgbs
             if opacity is not None:
-                if not isinstance(opacity, (float, int)):
+                if not isinstance(opacity, (float, int, np.floating)):
                     opacity = resize_with_interpolation(np.array(opacity), len(data))
                 data[name][:, 3] = opacity
         return self

manimlib/mobject/types/vectorized_mobject.py

@@ -185,7 +185,7 @@ def set_stroke(
         if width is not None:
             for mob in self.get_family(recurse):
                 data = mob.data if mob.get_num_points() > 0 else mob._data_defaults
-                if isinstance(width, (float, int)):
+                if isinstance(width, (float, int, np.floating)):
                     data['stroke_width'][:, 0] = width
                 else:
                     data['stroke_width'][:, 0] = resize_with_interpolation(