Adding indifferent access

[elizasorber]

Tackling issue #1296 Added indifferent access to create_instances_from_response in the ShopifyAPI::Rest::Base class.

Description

Fixes #

Please, include a summary of what the PR is for:

• What is the problem it is solving?
• What is the context of these changes?
• What is the impact of this PR?

How has this been tested?

Please, describe the tests that you ran to verify your changes.

Checklist:

• [ ] My commit message follow the pattern described in here
• [x] I have performed a self-review of my own code.
• [ ] I have added tests that prove my fix is effective or that my feature works.
• [ ] I have updated the project documentation.
• [ ] I have added a changelog line.

[sle-c]

@elizasorber , could you sign the CLA https://cla.shopify.com/ and comment "I have signed the CLA!"?

[elizasorber]

I have signed the CLA!

[elizasorber]

@sle-c Hi! Do I need to write tests or a changelog entry to get this issue approved and merged?

[sle-c]

hey @elizasorber , yeah we need a changelog entry and also change the import from /all to more explicit imports

[sle-c]

there's a rubocop rule that we need to fix as well as rebase on the main branch :)