Mention parameter name changes in the radial gradient methods in the MigrationGuide

docs/MigrationGuide.rst

@@ -650,6 +650,30 @@ wxPython for compatibility, but with a zero value. You can just stop using it
 in your code with no change in behavior. 
 
 
+Parameter name changes in radial gradient methods
+-------------------------------------------------
+
+The parameter names for the ``wx.GraphicsContext`` methods for creating radial
+gradients have changed in wxPython 4.1 to be a little more understandable. If
+you are passing these values via their keyword names then you will need to
+change your code. The prior C++ method signatures looked like this::
+
+    virtual wxGraphicsBrush
+    CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
+                              wxDouble xc, wxDouble yc,
+                              wxDouble radius,
+                              const wxGraphicsGradientStops& stops);
+
+And they now look like this::
+
+    virtual wxGraphicsBrush
+    CreateRadialGradientBrush(wxDouble startX, wxDouble startY,
+                              wxDouble endX, wxDouble endY,
+                              wxDouble radius,
+                              const wxGraphicsGradientStops& stops,
+                              const wxGraphicsMatrix& matrix = wxNullGraphicsMatrix);
+
+
 .. toctree::
    :maxdepth: 2
    :hidden:

wx/svg/_nanosvg.c

@@ -1,4 +1,4 @@
-/* Generated by Cython 0.29.12 */
+/* Generated by Cython 0.29.13 */
 
 /* BEGIN: Cython Metadata
 {
@@ -40,8 +40,8 @@ END: Cython Metadata */
 #elif PY_VERSION_HEX < 0x02060000 || (0x03000000 <= PY_VERSION_HEX && PY_VERSION_HEX < 0x03030000)
     #error Cython requires Python 2.6+ or Python 3.3+.
 #else
-#define CYTHON_ABI "0_29_12"
-#define CYTHON_HEX_VERSION 0x001D0CF0
+#define CYTHON_ABI "0_29_13"
+#define CYTHON_HEX_VERSION 0x001D0DF0
 #define CYTHON_FUTURE_DIVISION 0
 #include <stddef.h>
 #ifndef offsetof