Add node modules and new code for release (#57)

Co-authored-by: taakleton <taakleton@users.noreply.github.com>

node_modules/@tootallnate/once/dist/index.d.ts

@@ -0,0 +1,14 @@
+/// <reference types="node" />
+import { EventEmitter } from 'events';
+declare function once<T>(emitter: EventEmitter, name: string): once.CancelablePromise<T>;
+declare namespace once {
+    interface CancelFunction {
+        (): void;
+    }
+    interface CancelablePromise<T> extends Promise<T> {
+        cancel: CancelFunction;
+    }
+    type CancellablePromise<T> = CancelablePromise<T>;
+    function spread<T extends any[]>(emitter: EventEmitter, name: string): once.CancelablePromise<T>;
+}
+export = once;