chore(tox): add pytest-vcr dependency (#489)

Author: teocns

tox.ini

@@ -11,6 +11,7 @@ deps =
     pytest
     pytest-asyncio
     pytest-mock
+    pytest-vcr
     requests_mock
     coverage
     mypy: mypy
@@ -29,4 +30,4 @@ commands =
 
 [coverage:run]
 branch = True
-source = .
+source = .