docs: update supports Python 2.7 and 3.6 up to 3.10
@@ -29,7 +29,7 @@ suite with::
$ pip install -r requirements-tests.txt
$ pytest -v petl
-Currently :mod:`petl` supports Python 2.7, 3.4, 3.5 and 3.6
+Currently :mod:`petl` supports Python 2.7, 3.6 up to 3.10
so the tests should pass under all these Python versions.
Dependencies
