Typescriptify the main process code (9/N)

Summary: Converted scripts/build-release.js and scripts/build-headless.js to typescript

Reviewed By: passy

Differential Revision: D20066504

fbshipit-source-id: 25f336062361e1211b581f96979978a6bf4fe6d4

types/line-replace.d.ts

@@ -0,0 +1,18 @@
+/**
+ * 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
+ */
+
+declare module 'line-replace' {
+    export default function(args: {
+        file: string; 
+        line: number; 
+        text: string; 
+        addNewLine: boolean; 
+        callback: (args: {file: string; line: number; replacedText: string; text: string}) => void;
+    }): void;
+}