Roadmap for next 6 week cycle (#1195)

* Roadmap for next 6 week cycle

* more clarity on doc updates

* Revised roadmap

* update dates due to token exchange addition

* grammar

Author: nelsonwittwer

ROADMAP.md

@@ -0,0 +1,10 @@
+# Roadmap
+
+|Priority|Description|Delivery Time frame|
+|---|---|---|
+|P0|Respond timely to open issues/Pull Requests|Ongoing|
+|P1|Minor API release with support for 10-23 API version|Oct 6 - 13|
+|P2|Restore dot notation access to GraphQL responses|Oct 26 - Dec 7|
+|P2|Restrospection GQL queries to define types for GQL resources|October 26- Dec 7|
+|P2|New token exchange authentication via optional feature flag|October 26- Dec 7|
+|P3|[Extract REST resources into their own gem](https://github.com/Shopify/shopify-api-ruby/issues/1194)|Oct 26 - Dec 7|