added code snippet usage examples to uri-resolvers-js and uri-resolver-extensions-js README files

Author: krisbitney

packages/js/uri-resolvers/src/index.ts

@@ -2,5 +2,6 @@ export * from "./aggregator";
 export * from "./cache";
 export * from "./redirects";
 export * from "./packages";
+export * from "./wrappers";
 export * from "./helpers";
 export * from "./static";