Update dependency betamax to ^0.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
betamax	^0.8.0 -> ^0.9.0

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Release Notes

sigmavirus24/betamax (betamax)

v0.9.0

Compare Source

• Add support for urllib3 2.0
• Fix documentation
• Add support for binary serializer storage;
  useful with custom serializers (such as pickle based),
  however all builtin betamax serializers remain text based.
• Fix bug with new_episodes always trying to record.
• Improved documentation.
• This release drops support for Python 3.3;
  if you are still using Python 3.3
  update your Python or don't update to betamax 0.8.2.
• This release is the first release that declares support for Python 3.7,
  however previous versions most likely worked with 3.7 as well.

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