upgrade major dependencies

[ckmah]

Add support for latest major dependency versions including:

• decoupler>=1.7.0
• pandas>=2.0.0
• spatialdata>=0.1.0

Removed support for Python 3.9

Resolves #137

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 62.88%. Comparing base (d195c49) to head (c343f79).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #141 +/- ## ========================================== + Coverage 62.87% 62.88% +0.01% ========================================== Files 40 40 Lines 2257 2258 +1 ========================================== + Hits 1419 1420 +1 Misses 838 838 ```

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