fix: fixed Brotli decompression; (#5353)

test: added decompression tests;
fix: added legacy `x-gzip` & `x-compress` encoding types;

lib/platform/browser/index.js

@@ -43,6 +43,7 @@ const isStandardBrowserEnv = (() => {
  const isStandardBrowserWebWorkerEnv = (() => {
   return (
     typeof WorkerGlobalScope !== 'undefined' &&
+    // eslint-disable-next-line no-undef
     self instanceof WorkerGlobalScope &&
     typeof self.importScripts === 'function'
   );