fix: Try updating Podfile deployment target on prepare

[dpogue]

Platforms affected

iOS

Motivation and Context

Description

Testing

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[codecov-commenter]

Codecov Report

Merging #1341 (ae52f6e) into master (6db1b6e) will decrease coverage by 0.37%.
The diff coverage is 14.89%.

@@            Coverage Diff             @@
##           master    #1341      +/-   ##
==========================================
- Coverage   78.62%   78.25%   -0.37%     
==========================================
  Files          15       15              
  Lines        1773     1789      +16     
==========================================
+ Hits         1394     1400       +6     
- Misses        379      389      +10     

Impacted Files	Coverage Δ
lib/Api.js	81.00% <0.00%> (+9.50%)	⬆️
lib/PodsJson.js	75.00% <9.67%> (-20.05%)	⬇️
lib/prepare.js	83.37% <30.76%> (-1.66%)	⬇️

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[erisu]

LGTM

I tested setting the deployment target and confirm that the pods targets were updated.