Docs: Upgrade 0.10

Author: renatomefi

UPGRADE-0.10.md

@@ -0,0 +1,18 @@
+UPGRADE FROM 0.9 to 0.10
+=======================
+
+# Table of Contents
+
+- [GraphiQL](#graphiql)
+
+### GraphiQL
+
+ * The GraphiQL class has been removed in favor of a new bundle.
+
+  Upgrading:
+   - Remove the graphiql route from your application
+     - For standard Symfony installation: `/app/config/routing_dev.yml`
+     - For Symfony Flex: `/config/routes/dev/graphql_graphiql.yaml`
+   - Installing OverblogGraphiQLBundle
+     - `composer require overblog/graphiql-bundle`
+     - Follow instructions at https://github.com/overblog/GraphiQLBundle