Fix letter class to check if object is a string before matching

[arich]

Hi there,
I'm trying to update a Ruby on Rails app to Ruby 3.2 and we hit an error with one of our specs using the lob-ruby sdk.

The error was:

     NoMethodError:
       undefined method `=~' for [:ReturnEnvelope, :Boolean]:Array
     # /usr/local/bundle/gems/lob-6.0.2/lib/openapi_client/models/letter.rb:624:in `block in build_from_hash'
     # /usr/local/bundle/gems/lob-6.0.2/lib/openapi_client/models/letter.rb:621:in `each_pair'
     # /usr/local/bundle/gems/lob-6.0.2/lib/openapi_client/models/letter.rb:621:in `build_from_hash'
     # /usr/local/bundle/gems/lob-6.0.2/lib/openapi_client/models/letter.rb:612:in `build_from_hash'
     # /usr/local/bundle/gems/lob-6.0.2/lib/openapi_client/api_client.rb:282:in `convert_to_type'
     # /usr/local/bundle/gems/lob-6.0.2/lib/openapi_client/api_client.rb:242:in `deserialize'
     # /usr/local/bundle/gems/lob-6.0.2/lib/openapi_client/api_client.rb:73:in `call_api'
     # /usr/local/bundle/gems/lob-6.0.2/lib/openapi_client/api/letters_api.rb:158:in `letter_create_with_http_info'
     # /usr/local/bundle/gems/lob-6.0.2/lib/openapi_client/api/letters_api.rb:97:in `create'

In Ruby 3.2, they removed a deprecated method =~ on Object.
https://rubyreferences.github.io/rubychanges/3.2.html#removals

This seemed to fix it locally. I'm not sure what your standards are for this gem so this is the minimum change. Let me know what else you need for this to be merged. Thank you!

[arich]

FYI specs passed locally using Ruby 3.2.

$ rspec -P __tests__/Api/* --color --format doc
...
Finished in 0.15242 seconds (files took 0.3072 seconds to load)
199 examples, 0 failures

[lobster-hunter-y]

Hi @arich ,

Thank you very much for flagging this!

Currently, Lob's SDKs are generated via OpenAPI, so we are unable to accept and merge your pull request directly. However, our engineering team has been notified of this issue, and have confirmed that they will review the request and attempt to incorporate the changes into the generator for the next version.

I hope this helps! Please feel encouraged to let us know if you have any further questions :)

[arich]

Thanks @lobster-hunter-y! Closing.