fix: python.None.valueOf should return null

Author: sigmaSd

src/python.ts

@@ -772,11 +772,18 @@ export class PyObject {
    * a proxy to Python object.
    */
   valueOf(): any {
+    if (
+      Deno.UnsafePointer.equals(
+        this.handle,
+        python.None[ProxiedPyObject].handle,
+      )
+    ) {
+      return null;
+    }
+
     const type = py.PyObject_Type(this.handle);
 
-    if (Deno.UnsafePointer.equals(type, python.None[ProxiedPyObject].handle)) {
-      return null;
-    } else if (
+    if (
       Deno.UnsafePointer.equals(type, python.bool[ProxiedPyObject].handle)
     ) {
       return this.asBoolean();

test/test.ts

@@ -384,3 +384,7 @@ def call_the_callback(cb):
     pyCallback.destroy();
   }
 });
+
+Deno.test("None valueOf is null", () => {
+  assertEquals(python.None.valueOf(), null);
+});