update requirements to suit latest main

Signed-off-by: Max Chesterfield <max.chesterfield@zepben.com>

Author: chestm007

pyproject.toml

@@ -46,6 +46,7 @@
         "pytest-cov==6.1.1",
         "pytest-asyncio==0.26.0",
         "pytest-timeout==2.4.0",
+        "pytest-subtests",
         "hypothesis==6.119.4",  # 6.120.0 has issues with one of our large tests
         "grpcio-testing==1.61.3",
         "pylint==2.14.5",