feature/readme migration v6

README.md

@@ -20,9 +20,61 @@ Features:
 ## v6.0.0 migration
 
 ### Silence the warnings
+
 In version 5 there are many warnings to mark deprecated feature/functions/methods.
 They can be silenced by setting the `GSPREAD_SILENCE_WARNINGS` environment variable to `1`
 
+### HTTP Client
+
+HTTP Clients have moved a dedicated file. GSpread uses by default the `HTTPClient`.
+If you wish to use the new `BackoffHTTPClient` please update your code as follow:
+
+```pythong
+client = gspread.service_account(http_client=gspread.http_client.BackOffHTTPClient)
+```
+
+It works the same wayt for:
+
+- `gspread.service_account`
+- `gspread.oauth`
+- `gspread.service_account_from_dict`
+- `gspread.oauth_from_dict`
+
+### Stop support for python-3.7
+
+Python-3.7 is now end-of-life, GSpread stopped supporting it.
+
+Lowest supported python version: 3.8
+
+### Method signature changes
+
+The method ``Worksheet.update()`` has changed it's signature. The arguments ``range_name`` and ``values`` have swapped.
+
+Please now use kwargs to assign arguments to be compatible with both v5.X.Y and v6.X.Y version.
+
+```python
+file.sheet1.update(range_name="I7", values=[["54"]])
+```
+
+#### Notice:
+
+the argument `values` must be a list of list !
+
+### New tab color usage
+
+GSpread now uses hexadecimal value to color a tab.
+
+You can use the utility function `gspread.utils.convert_colors_to_hex_value` to convert dict values to a single hexadecimal values.
+
+The method ``gspread.Worksheet.update_tab_color()` accepts both dict and string values.
+
+You can update you code as follow:
+
+```python
+tab_color = {"red": 1, "green": 0.1345, "blue": 1}
+file.sheet1.update_tab_color(convert_colors_to_hex_value(**tab_color))
+```
+
 ## Installation
 
 ```sh