Use : not @ to delimit model version

We use `:` on the website and in other places, and it's as good a
delimiter as any, so this change follows the prevailing winds.

Author: erbridge

README.md

@@ -23,7 +23,7 @@ import replicate from "replicate";
 
 const prediction = await replicate
   .model(
-    "stability-ai/stable-diffusion@db21e45d3f7023abc2a46ee38a23973f6dce16bb082a930b0c49861f96d1e5bf"
+    "stability-ai/stable-diffusion:db21e45d3f7023abc2a46ee38a23973f6dce16bb082a930b0c49861f96d1e5bf"
   )
   .predict({
     prompt: "painting of a cat by andy warhol",
@@ -41,7 +41,7 @@ import replicate from "replicate";
 
 await replicate
   .model(
-    "stability-ai/stable-diffusion@db21e45d3f7023abc2a46ee38a23973f6dce16bb082a930b0c49861f96d1e5bf"
+    "stability-ai/stable-diffusion:db21e45d3f7023abc2a46ee38a23973f6dce16bb082a930b0c49861f96d1e5bf"
   )
   .predict(
     {
@@ -63,7 +63,7 @@ import replicate from "replicate";
 
 const prediction = await replicate
   .model(
-    "stability-ai/stable-diffusion@db21e45d3f7023abc2a46ee38a23973f6dce16bb082a930b0c49861f96d1e5bf"
+    "stability-ai/stable-diffusion:db21e45d3f7023abc2a46ee38a23973f6dce16bb082a930b0c49861f96d1e5bf"
   )
   .createPrediction({
     prompt: "painting of a cat by andy warhol",

lib/Model.test.js

@@ -19,7 +19,7 @@ beforeEach(() => {
   process.env.REPLICATE_API_TOKEN = "test-token-from-env";
 
   client = new ReplicateClient({});
-  model = client.model("test-owner/test-name@testversion");
+  model = client.model("test-owner/test-name:testversion");
 });
 
 describe("constructor()", () => {

lib/ReplicateClient.js

@@ -62,11 +62,11 @@ export default class ReplicateClient {
     let owner, name, version;
 
     if (typeof idOrParams === "string") {
-      const idComponents = /^([\w-]+)\/([\w-]+)@(\w+)$/.exec(idOrParams);
+      const idComponents = /^([\w-]+)\/([\w-]+):(\w+)$/.exec(idOrParams);
 
       if (!idComponents) {
         throw new ReplicateError(
-          `Invalid model ID: ${idOrParams}. This should be a string in the format {owner}/{name}@{version} or an object with owner, name, and version strings.`
+          `Invalid model ID: ${idOrParams}. This should be a string in the format {owner}/{name}:{version} or an object with owner, name, and version strings.`
         );
       }
 

lib/ReplicateClient.test.js

@@ -122,13 +122,13 @@ describe("getModelVersions()", () => {
 
 describe("model()", () => {
   it("returns Model", () => {
-    const model = client.model("test-owner/test-name@testversion");
+    const model = client.model("test-owner/test-name:testversion");
 
     expect(model).toBeInstanceOf(Model);
   });
 
   it("parses ID string", () => {
-    const model = client.model("test-owner/test-name@testversion");
+    const model = client.model("test-owner/test-name:testversion");
 
     expect(model.owner).toBe("test-owner");
     expect(model.name).toBe("test-name");