Add support for trusted Shopify domain .shop.dev

[Shinomix]

What this PR does

In this PR we add a new hostname .shop.dev to Shopify trusted domains to prevent internal flows from treating this hostname as a potential phishing attack.

Reviewer's guide to testing

• Install a Shopify App, such as Shop channel locally. Requests referred from the Admin should not be treated as phishing and be nullified.

[ ShopifyApp | INFO | Shop Not Found ] host param from callback is not from a trusted domain
[ ShopifyApp | INFO | Shop Not Found ] redirecting to root as this is likely a phishing attack

Checklist

Before submitting the PR, please consider if any of the following are needed:

• Update CHANGELOG.md if the changes would impact users
• Update README.md, if appropriate.
• Update any relevant pages in /docs, if necessary
• For security fixes, the Disclosure Policy must be followed.

[lizkenyon]

Thank you!

[lizkenyon]

@Shinomix could you add a line to the CHANGELOG.md before merging! Thanks!