docs: version notices for the GraphiQL readme (#1554)

Author: acao

packages/graphiql/README.md

@@ -2,6 +2,10 @@
 
 > **Breaking Changes & Improvements:** several interfaces are being dropped for new ones for GraphiQL 1.0.0! Read more in [this issue](https://github.com/graphql/graphiql/issues/1165)
 
+> **[`[email protected]`](https://github.com/graphql/graphiql/milestone/3)** is coming soon & will provide a stable release with react 16, graphql 15 support, fixes, and a headers tab
+
+> **[`[email protected]`](https://github.com/graphql/graphiql/issues/983)** is a much larger ongoing effort that introduces plugins, i18n, and so many more features after a substantial rewrite using modern react.
+
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