Update dependencies

[jreadey]

Remove python 3.9 support and update dependencies.

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Important

Update dependencies, remove Python 3.9 support, and update version to 0.9.4.

• Python Support:
  • Removed support for Python 3.9 in pyproject.toml.
• Version Update:
  • Updated HSDS_VERSION to 0.9.4 in hsds/basenode.py.
  • Updated project version to 0.9.4 in pyproject.toml.
• Dependencies:
  • Updated numpy to >=2.0.0 in pyproject.toml.
  • Replaced requests-unixsocket2 with requests-unixsocket in pyproject.toml.
  • Updated requirements.txt with specific versions for all dependencies.

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