Added publish:npm script

Author: jakeboone02

package.json

@@ -32,7 +32,8 @@
     "build": "tsdx build --format cjs,esm,system,umd",
     "test": "tsdx test",
     "lint": "tsdx lint",
-    "prepare": "npm run build"
+    "prepare": "npm run build",
+    "publish:npm": "np"
   },
   "prettier": {
     "printWidth": 80,