Revert cloudflare decompression to own function

* polyfill takes up too much CPU time
* bump cloudflare workers-types
* add tsc checks to CI for serverless

serverless/shared/index.ts

@@ -39,7 +39,7 @@ export const tile_path = (
 
 export const tileJSON = (
   header: Header,
-  metadata: unknown,
+  metadata: any,
   hostname: string,
   tileset_name: string
 ) => {