Add setImmediate polyfill to web, fixing dropdown items

src/platform/polyfills.native.ts

@@ -1 +0,0 @@
-import '@zxing/text-encoding' // TextEncoder / TextDecoder

src/platform/polyfills.ts

@@ -1,2 +1 @@
-// do nothing
 export {}

src/platform/polyfills.web.ts

@@ -0,0 +1,4 @@
+/// <reference lib="dom" />
+
+// @ts-ignore whatever typescript wants to complain about here, I dont care about -prf
+window.setImmediate = (cb: () => void) => setTimeout(cb, 0)