Add changeset for #991 (#992)

.changeset/fast-shoes-pretend.md

@@ -0,0 +1,22 @@
+---
+'@sumup/circuit-ui': major
+---
+
+Switched to the new JSX transform with automatic runtime. You will need to update your Babel config to use Emotion's JSX runtime. For example, with Next.js and Emotion 10:
+
+```json
+{
+  "presets": [
+    [
+      "next/babel",
+      {
+        "preset-react": {
+          "runtime": "automatic",
+          "importSource": "@emotion/core"
+        }
+      }
+    ]
+  ],
+  "plugins": [["babel-plugin-emotion", { "cssPropOptimization": true }]]
+}
+```