Converted Error and ListBox to typescript (#47)

frontend/tsconfig.json

@@ -23,7 +23,8 @@
     ],
     "allowJs": true,
     "skipLibCheck": true,
-    "strict": false,
+    "strict": true,
+    "noImplicitAny": true,
     "forceConsistentCasingInFileNames": true,
     "noEmit": true,
     "esModuleInterop": true,
@@ -37,8 +38,8 @@
   "include": [
     "next-env.d.ts",
     "**/*.ts",
-    "**/*.tsx"
-, "components/basic/layout.js"  ],
+    "**/*.tsx",
+  ],
   "exclude": [
     "node_modules"
   ]