Don't export createWorker from index

Author: aminya

docs/usage.md

@@ -175,7 +175,8 @@ You can also pass other `WorkerOptions` in this object.
 `createWorker` uses dynamic imports to only import the needed implementation, so you can import the needed functions directly to reduce the bundle size.
 
 ```js
-import { createWorker, spawn, Thread } from "threads"
+import { createWorker } from "threads/createWorker"
+import { spawn, Thread } from "threads"
 
 async function run() {
   const worker = await createWorker("./worker.js", {backend: "node"})

src/index.ts

@@ -3,4 +3,3 @@ export * from "./master/index"
 export { expose } from "./worker/index"
 export { DefaultSerializer, JsonSerializable, Serializer, SerializerImplementation } from "./serializers"
 export { Transfer, TransferDescriptor } from "./transferable"
-export { createWorker } from "./createWorker"

tsconfig.json

@@ -13,6 +13,7 @@
   },
   "include": [
     "./src/index.ts",
+    "./src/createWorker.ts",
     "./src/observable.ts",
     "./src/master/*",
     "./src/worker/*",