Support deploying an npm package exporting a formatCode method.

dist/dart-style.d.ts

Index: dist/dart-style.d.ts
diff --git a/dist/dart-style.d.ts b/dist/dart-style.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..59d4dafbd86a856fbd71b1db9cffbdf0986e685e
--- /dev/null
+++ b/dist/dart-style.d.ts
@@ -0,0 +1,14 @@
+// Type definitions for dart-style
+
+declare module style {
+    interface FormatResult {
+      code?: string;
+      error?: string;
+    }
+
+    export function formatCode(code: string): FormatResult;
+}
+
+declare module "dart-style" {
+    export = style;
+}