optimized tsconfig for type checking only

tsconfig.json

@@ -1,14 +1,15 @@
 {
   "compilerOptions": {
+    "allowJs": true,
     "allowSyntheticDefaultImports": true,
     "esModuleInterop": true,
+    "isolatedModules": true,
     "jsx": "react-native",
     "lib": ["es6"],
-    "module": "es6",
     "moduleResolution": "node",
     "noEmit": true,
-    "noImplicitAny": true,
-    "target": "es6"
+    "strict": true,
+    "target": "esnext"
   },
   "exclude": ["node_modules"]
 }