fix broken build - switch to ncc build (#56)

* switch to ncc build

* update

* bump ncc

package.json

@@ -2,9 +2,9 @@
    "name": "k8s-set-context-action",
    "version": "1.0.0",
    "private": true,
-   "main": "lib/run.js",
+   "main": "lib/index.js",
    "scripts": {
-      "build": "tsc --outDir ./lib --rootDir ./src",
+      "build": "ncc build src/run.ts -o lib",
       "test": "jest",
       "test-coverage": "jest --coverage",
       "format": "prettier --write .",
@@ -28,6 +28,7 @@
       "@types/jest": "^28.1.2",
       "@types/js-yaml": "^4.0.4",
       "@types/node": "^16.0.0",
+      "@vercel/ncc": "^0.34.0",
       "jest": "^28.1.1",
       "prettier": "2.7.1",
       "ts-jest": "^28.0.5",