Add WasmJS project example to README

Author: sksamuel

README.md

@@ -10,3 +10,4 @@ This repo contains multiple examples of how to use Kotest.
 * [Native](./kotest-native) — example of a native project with Linux, Windows and Mac targets
 * [Spring Webflux](./kotest-spring-webflux) — example of a JVM project using Spring Webflux
 * [Allure](./kotest-allure) — example of a JVM project using Allure test reporting
+* [Allure](./kotest-wasm) — example of a WasmJS project