🔧 Add workaround to support nested example project

Thank you facebook/react-native#21242 (comment)

Author: cooperka

example/rn-cli.config.js

@@ -0,0 +1,9 @@
+const blacklist = require('metro-config/src/defaults/blacklist');
+
+module.exports = {
+  resolver: {
+    blacklistRE: blacklist([
+      /node_modules\/.*\/node_modules\/react-native\/.*/,
+    ])
+  },
+};