refactor(TypeScript): Add noImplicitAny

We automatically insert explicit 'any's where needed. These need to be
addressed as in #9100.

Fixes #4924

modules/empty.ts

@@ -1,4 +1,4 @@
 // This file intentionally left blank. It is used to load nothing in some cases.
 // Such as parse5/index is redirected here instead of loading into browser.
 
-export var __empty__;
+export var __empty__: any /** TODO #9100 */;