Revert changes to tsc/ncc

package.json

@@ -37,7 +37,7 @@
   "main": "dist/index.js",
   "private": true,
   "scripts": {
-    "build": "tsc && ncc build lib/main.js",
+    "build": "ncc build src/main.ts",
     "test": "jest"
   }
 }