chore: update test dependencies (#761)

Author: daniel-sanche

noxfile.py

@@ -43,6 +43,7 @@
 ]
 UNIT_TEST_EXTERNAL_DEPENDENCIES = [
     "aiounittest",
+    "six",
 ]
 UNIT_TEST_LOCAL_DEPENDENCIES = []
 UNIT_TEST_DEPENDENCIES = []
@@ -57,6 +58,7 @@
 ]
 SYSTEM_TEST_EXTERNAL_DEPENDENCIES = [
     "pytest-asyncio",
+    "six",
 ]
 SYSTEM_TEST_LOCAL_DEPENDENCIES = []
 SYSTEM_TEST_DEPENDENCIES = []

owlbot.py

@@ -139,8 +139,8 @@ def update_fixup_scripts(library):
 templated_files = common.py_library(
     samples=False,  # set to True only if there are samples
     system_test_python_versions=["3.7"],
-    unit_test_external_dependencies=["aiounittest"],
-    system_test_external_dependencies=["pytest-asyncio"],
+    unit_test_external_dependencies=["aiounittest", "six"],
+    system_test_external_dependencies=["pytest-asyncio", "six"],
     microgenerator=True,
     cov_level=100,
     split_system_tests=True,