Doesn't work, shopify API now requires version to be set explicitly

[fzembow]

When trying to authenticate, you get shopify.api_version.VersionNotFoundError. This is because it seems Shopify now requires that an API version number be set explicitly in the Session, see: https://github.com/Shopify/shopify_python_api#-breaking-change-notice-for-version-500-

[zinyosrim]

The readme has information on this

[Anmol-Gulati]

Contributions and updates to repo are welcome. Happy to review 🙂

[fzembow]

@Anmol-Gulati see #5

@zinyosrim not sure what information you're referring to (README doesn't say anything about shopify versions), updated documentation in my PR though

[daniel-gomes]

@fzembow thanks for the fix, however, I needed to do some changes to get the shopify_login_required()decorator working since the Shopify Version was still missing in some places, I PR'ed it to your PR: formsort#1 . Have a look and let me know, would be great to get these 2 PRs merged!