Fix compatibility with pytest-recording

pytest-recording stores cassettes for each module in its own directory.
Using "vcr_cassette_dir" fixture, we override it to use the old
behavior.

Part of https://github.com/halcy/Mastodon.py/pull/407

--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -63,6 +63,11 @@ def vcr_config():
         decode_compressed_response = True
     )
 
+@pytest.fixture(scope="module")
+def vcr_cassette_dir(request) -> str:
+    module = request.node.fspath  # current test file
+    return os.path.join(module.dirname, "cassettes")
+
 # Fixtures for testing against actual, real servers
 # Please be extremely careful with these
 @pytest.fixture
diff --git a/tests/test_streaming.py b/tests/test_streaming.py
index 7bbdfc0..0f66519 100644
--- a/tests/test_streaming.py
+++ b/tests/test_streaming.py
@@ -14,11 +14,6 @@ streaming_is_patched = False
 real_connections = []
 close_connections = False
 
-@pytest.fixture(scope='module')
-def vcr(vcr):
-    vcr.match_on = ['path']
-    return vcr
-
 @pytest.fixture(scope='module')
 def vcr_config():
     return {
-- 
2.49.0