Search for update logic

Summary:
To be used in the following diff and because it's super side effect
heavy, I didn't bother to implement tests for it.

Reviewed By: jknoxville

Differential Revision: D18479311

fbshipit-source-id: 5cbcae0ebf2de4558b993325e50f6a2da1ed3ea7

types/npm-api.d.ts

@@ -0,0 +1,38 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+// Very incomplete stub with only the methods we use defined.
+declare module 'npm-api' {
+    export default class NpmApi {
+        constructor(...args: any[]);
+
+        list(...args: any[]): any;
+
+        maintainer(...args: any[]): any;
+
+        repo(name: string): Repository;
+
+        reset(...args: any[]): any;
+
+        use(...args: any[]): any;
+
+        view(...args: any[]): any;
+
+    }
+
+    export class Repository {
+        package(): Promise<Package>;
+    }
+
+    export interface Package {
+        name: string;
+        version: string;
+    }
+
+}