Saving inital relay POC

client/node_modules/engine.io-client/build/esm/util.d.ts

@@ -0,0 +1,7 @@
+export declare function pick(obj: any, ...attr: any[]): any;
+export declare function installTimerFunctions(obj: any, opts: any): void;
+export declare function byteLength(obj: any): number;
+/**
+ * Generates a random 8-characters string.
+ */
+export declare function randomString(): string;