fix: missing global in browser environments

Author: legendecas

packages/opentelemetry-api/src/api/global-utils.ts

@@ -38,7 +38,11 @@ type MyGlobals = Partial<{
   [GLOBAL_TRACE_API_KEY]: Get<TracerProvider>;
 }>;
 
-export const _global = global as typeof global & MyGlobals;
+export const _global = (typeof globalThis === 'object'
+  ? globalThis
+  : typeof global === 'object'
+  ? global
+  : window) as MyGlobals;
 
 /**
  * Make a function which accepts a version integer and returns the instance of an API if the version