fix: workaround undefined global this

Default export of globalThis seems to have a problem
in the "browser" field when the library is loaded asynchronously
with webpack, so this is a quick workaround.

lib/transports/polling.ts

@@ -7,7 +7,10 @@ import XMLHttpRequest from "./xmlhttprequest.js";
 import { Emitter } from "@socket.io/component-emitter";
 import { SocketOptions } from "../socket.js";
 import { installTimerFunctions, pick } from "../util.js";
-import globalThis from "../globalThis.js";
+import * as globalThisModule from "../globalThis.js";
+const globalThis =
+  globalThisModule.default ||
+  ((globalThisModule as any) as typeof globalThisModule.default);
 
 const debug = debugModule("engine.io-client:polling"); // debug()
 

lib/transports/websocket-constructor.browser.ts

@@ -1,4 +1,7 @@
-import globalThis from "../globalThis.js";
+import * as globalThisModule from "../globalThis.js";
+const globalThis =
+  globalThisModule.default ||
+  ((globalThisModule as any) as typeof globalThisModule.default);
 
 export const nextTick = (() => {
   const isPromiseAvailable =

lib/transports/xmlhttprequest.browser.ts

@@ -1,7 +1,10 @@
 // browser shim for xmlhttprequest module
 
 import { hasCORS } from "../contrib/has-cors.js";
-import globalThis from "../globalThis.js";
+import * as globalThisModule from "../globalThis.js";
+const globalThis =
+  globalThisModule.default ||
+  ((globalThisModule as any) as typeof globalThisModule.default);
 
 export default function(opts) {
   const xdomain = opts.xdomain;

lib/util.ts

@@ -1,4 +1,7 @@
-import globalThis from "./globalThis.js";
+import * as globalThisModule from "./globalThis.js";
+const globalThis =
+  globalThisModule.default ||
+  ((globalThisModule as any) as typeof globalThisModule.default);
 
 export function pick(obj, ...attr) {
   return attr.reduce((acc, k) => {

lib/xmlhttprequest.ts

@@ -1,7 +1,10 @@
 // browser shim for xmlhttprequest module
 
 import { hasCORS } from "./contrib/has-cors.js";
-import globalThis from "./globalThis.js";
+import * as globalThisModule from "./globalThis.js";
+const globalThis =
+  globalThisModule.default ||
+  ((globalThisModule as any) as typeof globalThisModule.default);
 
 export default function(opts) {
   const xdomain = opts.xdomain;