fix: Resolve TypeScript errors

Signed-off-by: Hermes Agent <hermes@nosuchhost>

client/node_modules/immediate/lib/messageChannel.js

@@ -0,0 +1,18 @@
+'use strict';
+
+exports.test = function () {
+  if (global.setImmediate) {
+    // we can only get here in IE10
+    // which doesn't handel postMessage well
+    return false;
+  }
+  return typeof global.MessageChannel !== 'undefined';
+};
+
+exports.install = function (func) {
+  var channel = new global.MessageChannel();
+  channel.port1.onmessage = func;
+  return function () {
+    channel.port2.postMessage(0);
+  };
+};