Adding cli wrapper and a bin definition in package.json

bin/cli.js

@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+
+require("ts-node").register();
+require("../dependency-tree.ts");

package-lock.json

@@ -1,5 +1,5 @@
 {
-  "name": "dependency-tree",
+  "name": "npm-dependency-tree",
   "version": "1.0.0",
   "lockfileVersion": 1,
   "requires": true,

package.json

@@ -1,8 +1,11 @@
 {
-  "name": "dependency-tree",
+  "name": "npm-dependency-tree",
   "version": "1.0.0",
   "description": "",
   "main": "index.js",
+  "bin": {
+    "npm-dependency-tree": "./bin/cli.js"
+  },
   "scripts": {
     "start": "ts-node dependency-tree.ts",
     "test": "echo \"Error: no test specified\" && exit 1"