Add Invoice update-status and disable endpoint support

Add Invoice.update_status (PATCH /invoices/{uuid}) for updating invoice
status and Invoice.disable (PATCH /invoices/{uuid}/disable) for
disabling invoices.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: wscourge

chartmogul/api/invoice.py

@@ -98,3 +98,5 @@ def all(cls, config, **kwargs):
     "/data_sources{/data_source_uuid}/customers{/customer_uuid}/invoices",
 )
 Invoice.retrieve = Invoice._method("retrieve", "get", "/invoices{/uuid}")
+Invoice.update_status = Invoice._method("modify", "patch", "/invoices{/uuid}")
+Invoice.disable = Invoice._method("patch", "patch", "/invoices{/uuid}/disable")

test/api/test_invoice.py

@@ -673,3 +673,52 @@ def test_line_item_and_transaction_errors(self, mock_requests):
         self.assertEqual(result.line_items[0].errors["amount_in_cents"], ["must be positive"])
         self.assertIsNotNone(result.transactions[0].errors)
         self.assertEqual(result.transactions[0].errors["date"], ["is in the future"])
+
+    @requests_mock.mock()
+    def test_update_status(self, mock_requests):
+        updatedInvoice = dict(retrieveInvoiceExample)
+        updatedInvoice["disabled"] = False
+
+        mock_requests.register_uri(
+            "PATCH",
+            "https://api.chartmogul.com/v1/invoices/inv_22910fc6-c931-48e7-ac12-90d2cb5f0059",
+            request_headers={"Authorization": "Basic dG9rZW46"},
+            headers={"Content-Type": "application/json"},
+            status_code=200,
+            json=updatedInvoice,
+        )
+
+        config = Config("token")
+        result = Invoice.update_status(
+            config,
+            uuid="inv_22910fc6-c931-48e7-ac12-90d2cb5f0059",
+            data={"disabled": False}
+        ).get()
+
+        self.assertEqual(mock_requests.call_count, 1, "expected call")
+        self.assertTrue(isinstance(result, Invoice))
+        self.assertEqual(result.uuid, "inv_22910fc6-c931-48e7-ac12-90d2cb5f0059")
+
+    @requests_mock.mock()
+    def test_disable(self, mock_requests):
+        disabledInvoice = dict(retrieveInvoiceExample)
+        disabledInvoice["disabled"] = True
+
+        mock_requests.register_uri(
+            "PATCH",
+            "https://api.chartmogul.com/v1/invoices/inv_22910fc6-c931-48e7-ac12-90d2cb5f0059/disable",
+            request_headers={"Authorization": "Basic dG9rZW46"},
+            headers={"Content-Type": "application/json"},
+            status_code=200,
+            json=disabledInvoice,
+        )
+
+        config = Config("token")
+        result = Invoice.disable(
+            config,
+            uuid="inv_22910fc6-c931-48e7-ac12-90d2cb5f0059",
+        ).get()
+
+        self.assertEqual(mock_requests.call_count, 1, "expected call")
+        self.assertTrue(isinstance(result, Invoice))
+        self.assertTrue(result.disabled)