feat: configure TypeScript with strict mode

tsconfig.json

@@ -1,4 +1,12 @@
 {
-  "files": [],
+  "compilerOptions": {
-  "references": [{ "path": "./tsconfig.node.json" }, { "path": "./tsconfig.web.json" }]
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "tests"]
 }