Add back run identifier type definition

Author: mattt

index.d.ts

@@ -58,6 +58,8 @@ declare module 'replicate' {
 
   export type Training = Prediction;
 
+  type RunIdentifier = `${string}/${string}:${string}`;
+
   interface RunOptions {
     input: any;
     wait?: {
@@ -87,8 +89,8 @@ declare module 'replicate' {
     fetch: Function;
 
 
-    run(identifier: string, options: RunOptions & { stream: true }): Promise<AsyncIterable<any>>;
-    run(identifier: string, options: RunOptions): Promise<object>;
+    run(identifier: RunIdentifier, options: RunOptions & { stream: true }): Promise<AsyncIterable<any>>;
+    run(identifier: RunIdentifier, options: RunOptions): Promise<object>;
 
     request(route: string, parameters: any): Promise<any>;
     paginate<T>(endpoint: () => Promise<Page<T>>): AsyncGenerator<[ T ]>;