Fix authorize url to include missing parameters
Fix authorize url to include missing parameters

There are several changes in authorization url according to Shopify's
guides
(https://help.shopify.com/api/guides/authentication/oauth#asking-for-permission).
Redirect uri is now required, and there are two optional parameters as
well. Now Shopify allows to use nonce parameter which is the suggested
way. Nonce improves security of the application!

noerjeffries/ohShopify.php