Use ncc to package the action

Author: MatteoPologruto

package.json

@@ -7,7 +7,8 @@
   "scripts": {
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
-    "test": "jest"
+    "test": "jest",
+    "pack": "ncc build"
   },
   "repository": {
     "type": "git",