Add support for custom fetch function and/or IANA bootstrap data (#21)

tsconfig.json

@@ -1,20 +1,26 @@
 {
   "$schema": "https://json.schemastore.org/tsconfig",
   "compilerOptions": {
-    "target": "esnext",
-    "moduleDetection": "force",
-    "module": "preserve",
+    "target": "ES2022",
+    "lib": ["ES2022"],
+    "module": "ESNext",
     "moduleResolution": "bundler",
-    "resolveJsonModule": true,
+    "moduleDetection": "force",
     "strict": true,
     "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "forceConsistentCasingInFileNames": true,
     "declaration": true,
-    "emitDeclarationOnly": true,
+    "declarationMap": true,
+    "sourceMap": true,
     "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
     "isolatedModules": true,
     "verbatimModuleSyntax": true,
-    "skipLibCheck": true,
-    "types": ["vitest/globals"]
+    "resolveJsonModule": true,
+    "skipLibCheck": true
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist"]