include node_modules so release .zip is deployable

node_modules/tstl/thread/Singleton.d.ts

@@ -0,0 +1,11 @@
+/**
+ * Singleton generator.
+ *
+ * @author Jeongho Nam - https://github.com/samchon
+ */
+export declare class Singleton<T, Args extends any[] = []> {
+    private readonly closure_;
+    private value_;
+    constructor(closure: (...args: Args) => T);
+    get(...args: Args): T;
+}