Add notice of not maintained

CodingItWrong · CodingItWrong · commit 1e0569093487 · 2020-11-20T18:24:23.000-05:00
diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 # @reststate/client
 
-[![CircleCI](https://circleci.com/gh/reststate/reststate-client.svg?style=svg)](https://circleci.com/gh/reststate/reststate-client)
+**This package is no longer maintained.**
 
 A lightweight client for making requests to a JSON:API service.
 
diff --git a/docs/README.md b/docs/README.md
@@ -1,5 +1,9 @@
 # @reststate/client
 
+:::danger
+This package is no longer maintained.
+:::
+
 A lightweight client for making requests to a JSON:API service.
 
 - It doesn't attempt to provide a way to utilize every possible feature of JSON:API; instead, it offers a core set of functionality sufficient for most apps.
