migrating to TypeScript

tsconfig.json

+{
+  "compilerOptions": {
+    "target": "es6",
+    "module": "commonjs",
+    "rootDir": "./",
+    "outDir": "./built",
+    "esModuleInterop": true,
+    "strict": true,
+    "allowJs": true
+  }
+}
\ No newline at end of file