add missing test file from last commit

Author: swannodette

src/test/cljs_build/npm_deps_test/invoke.cljs

@@ -0,0 +1,10 @@
+(ns npm-deps-test.invoke
+  (:require [react :refer [createElement]]
+            ["react-dom/server" :as ReactDOMServer]
+            ["lodash-es/array" :as array]))
+
+(createElement "div")
+
+(ReactDOMServer/renderToString nil)
+
+(array/findIndex #js [1 2] 2)