fix(tsbuild): Avoid process.exit in library, add confirmskiplibcheck flag, improve CLI exit handling and JSON/quiet modes, update test script

package.json

@@ -10,7 +10,7 @@
     "tsbuild": "./cli.js"
   },
   "scripts": {
-    "test": "tsrun test/test.ts --verbose",
+    "test": "tstest test/test.ts --verbose",
     "build": "node cli.ts.js --web",
     "buildDocs": "tsdoc"
   },