clean up making user agent optional (#28)

Author: zeke

README.md

@@ -20,7 +20,6 @@ import Replicate from "replicate";
 const replicate = new Replicate({
   // get your token from https://replicate.com/account
   auth: process.env.REPLICATE_API_TOKEN,
-  userAgent: "my-app/1.2.3",
 });
 ```
 
@@ -71,11 +70,11 @@ prediction = await replicate.wait(prediction);
 const replicate = new Replicate(options);
 ```
 
-| name                | type   | description                              |
-| ------------------- | ------ | ---------------------------------------- |
-| `options.auth`      | string | **Required**. API access token           |
-| `options.userAgent` | string | **Required**. Identifier of your app     |
-| `options.baseUrl`   | string | Defaults to https://api.replicate.com/v1 |
+| name                | type   | description                                                                       |
+| ------------------- | ------ | --------------------------------------------------------------------------------- |
+| `options.auth`      | string | **Required**. API access token                                                    |
+| `options.userAgent` | string | Identifier of your app. Defaults to `replicate-javascript/${packageJSON.version}` |
+| `options.baseUrl`   | string | Defaults to https://api.replicate.com/v1                                          |
 
 ### `replicate.models.get`
 

index.d.ts

@@ -3,7 +3,7 @@ type Identifier = `${string}/${string}:${string}`;
 declare module "replicate" {
   export interface ReplicateOptions {
     auth: string;
-    userAgent: string;
+    userAgent?: string;
     baseUrl?: string;
   }