Add changelog

Author: rubengrill

CHANGELOG.md

@@ -0,0 +1,24 @@
+# 1.0.0
+
+- Improve docs
+- Add `create-react-app` examples
+- Support GraphQL interfaces
+- Support GraphQL union types
+- Support fragments and inline fragments
+- Support `__typename` selection
+- Support alias in selections
+- Support custom scalar types
+- Support errors
+- Add typed version of `useSubscription`
+
+Backward incompatible change:
+
+To support errors, the argument `data` changed to `result` which can contain both `data` and `errors`:
+
+```js
+// old
+apolloMock(documentNode, variables, { authors: [] });
+
+// new
+apolloMock(documentNode, variables, { data: { authors: [] } });
+```