Add shebang

Author: benjie

package.json

@@ -8,7 +8,7 @@
     "semantic-to-strict": "dist/cli/to-strict.js"
   },
   "scripts": {
-    "prepack": "tsc",
+    "prepack": "tsc && chmod +x dist/cli/*.js",
     "test": "node --test",
     "watch": "tsc --watch",
     "lint": "yarn prettier:check && eslint --ext .js,.jsx,.ts,.tsx,.graphql .",

src/cli/to-nullable.ts

@@ -1,3 +1,4 @@
+#!/usr/bin/env node
 import { main } from "../cli.js";
 
 main(false);

src/cli/to-strict.ts

@@ -1,3 +1,4 @@
+#!/usr/bin/env node
 import { main } from "../cli.js";
 
 main(true);