Airflow 2.0.2 Compatibility

[fritz-astronomer]

• cicd: bump act versions, add codecov token
• fix: move Context import to TYPECHECKING
• fix: rm Context import, test down to 2.0.2
• fix: add compat for 2.0, bump version

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 36.36364% with 14 lines in your changes missing coverage. Please review.

Project coverage is 38.96%. Comparing base (de68415) to head (b9b714c).
Report is 109 commits behind head on main.

Files with missing lines	Patch %	Lines
...tronomer_starship/compat/starship_compatability.py	22.22%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #109      +/-   ##
==========================================
- Coverage   41.28%   38.96%   -2.33%     
==========================================
  Files          16       11       -5     
  Lines        1153     1078      -75     
==========================================
- Hits          476      420      -56     
+ Misses        677      658      -19     

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