Fix case-sensitive path

app/src/components/Demo/index.tsx

@@ -0,0 +1,14 @@
+import * as React from 'react'
+import ShowText from './ShowText'
+import Mouse from './Mouse';
+
+(window as any).demo = {}
+
+export default function render(props: any) {
+  return (
+    <span>
+      <ShowText />
+      <Mouse />
+    </span>
+  )
+}