Undefined Method `exists?' for class File in Ruby 3.2.0

[yann120]

After upgrading to Ruby 3.2.0, I encountered an error with the shopify-mock gem. Specifically, the method File.exists? used in the gem is no longer available in Ruby 3.2.0, leading to a NoMethodError.

Error Message:
undefined method `exists?' for class File (NoMethodError)

Suggested Fix:
Replace File.exists? with File.exist? which is the correct method name in Ruby 3.2.0.

Steps to Reproduce:
Upgrade Ruby to version 3.2.0.
Use the shopify-mock gem to the last version
Run any operation that invokes the File.exists? method in the gem.
Impact:
This issue prevents the gem from functioning properly with Ruby 3.2.0, which could affect all users who have upgraded to this version of Ruby.

Proposed Solution:
I would like to open a Pull Request to fix this issue by replacing all instances of File.exists? with File.exist? in the gem's codebase.