Update files included in package

package.json

@@ -2,7 +2,7 @@
   "name": "ts-starfish",
   "version": "0.9.0",
   "description": "an interpreter for the *><> esolang written in TypeScript",
-  "main": "dist/main.ts",
+  "main": "dist/main.js",
   "type": "module",
   "scripts": {
     "build": "tsc",
@@ -31,5 +31,6 @@
   },
   "jest": {
     "transform": {}
-  }
+  },
+  "files": ["dist"]
 }