fix(browser): add navigator polifilly for wechat mini (#1796)

Fixes #1789

Author: robertsLando

esbuild.js

@@ -20,7 +20,15 @@ const options = {
         polyfillNode({
             polyfills: [
                 'readable-stream'
-            ]
+            ],
+            globals: {
+                global: false,
+                __dirname: false,
+                __filename: false,
+                buffer: true,
+                process: true,
+                navigator: true, // Needed for WeChat, ref #1789
+            }
         }),
     ],
 }