Upgrade vcrpy to 8.2.1 to fix aiohttp 3.14 compatibility

[leszekhanusz]

Fixing the following errors in the tests:

ERROR tests/test_transport.py::test_hero_name_query - AttributeError: module 'aiohttp.streams' has no attribute 'AsyncStreamReaderMixin'
ERROR tests/test_transport.py::test_query_with_variable - AttributeError: module 'aiohttp.streams' has no attribute 'AsyncStreamReaderMixin'
ERROR tests/test_transport.py::test_named_query - AttributeError: module 'aiohttp.streams' has no attribute 'AsyncStreamReaderMixin'
ERROR tests/test_transport.py::test_header_query - AttributeError: module 'aiohttp.streams' has no attribute 'AsyncStreamReaderMixin'
ERROR tests/test_transport_batch.py::test_hero_name_query - AttributeError: module 'aiohttp.streams' has no attribute 'AsyncStreamReaderMixin'
ERROR tests/test_transport_batch.py::test_query_with_variable - AttributeError: module 'aiohttp.streams' has no attribute 'AsyncStreamReaderMixin'
ERROR tests/test_transport_batch.py::test_named_query - AttributeError: module 'aiohttp.streams' has no attribute 'AsyncStreamReaderMixin'
ERROR tests/test_transport_batch.py::test_header_query - AttributeError: module 'aiohttp.streams' has no attribute 'AsyncStreamReaderMixin'

Related vcrpy issue: kevin1024/vcrpy#995

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (7fb869a) to head (26a4c78).
⚠️ Report is 62 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##            master      #599    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files           38        40     +2     
  Lines         2908      3322   +414     
==========================================
+ Hits          2908      3322   +414     

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