Fix to logic determining if context.matched in response

[dchandan]

Description:
Currently, if an API does not return the context.matched key in the search response then ItemSearch.matched fails with a KeyError. This is not ideal, because if for any reason appropriate information needed to determine the number of matched results is not present in the response, then according to the function's description, the function should return None. This PR makes a minor fix to ameliorate the issue.

P.S. I realize now that I've misspelled "Matched" as "Marched" in my branch name. Sorry.

PR Checklist:

• Code is formatted
• Tests pass
• Changes are added to the CHANGELOG

[dchandan]

Okay, I just noticed that my editor did some black formatting as well. I hope this is OK and there are no rule violations with the performed formatting.

[gadomski]

@dchandan yeah, the formatting broke CI. Please use pre-commit to ensure the hooks run correctly: https://pystac-client.readthedocs.io/en/stable/contributing.html#code-quality-checks.

Otherwise, looks good, thank you!

[dchandan]

@dchandan yeah, the formatting broke CI. Please use pre-commit to ensure the hooks run correctly: https://pystac-client.readthedocs.io/en/stable/contributing.html#code-quality-checks.

Otherwise, looks good, thank you!

Thanks for the clarification @gadomski. pre-commit issue should be fixed now.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.44%. Comparing base (21435b0) to head (0a06861).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #646   +/-   ##
=======================================
  Coverage   93.43%   93.44%           
=======================================
  Files          13       13           
  Lines         990      991    +1     
=======================================
+ Hits          925      926    +1     
  Misses         65       65           

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