🔧 Use isolated module and update target ES version

Author: exah

src/index.ts

@@ -305,14 +305,14 @@ function create<P extends Payload>(baseOptions: Options<P> = {}): Instance<P> {
 const { get, post, put, patch, head, delete: _delete } = create()
 
 export {
-  ResponsePromise,
-  Payload,
-  Options,
-  Instance,
-  Response,
+  type ResponsePromise,
+  type Payload,
+  type Options,
+  type Instance,
+  type Response,
+  type Serialize,
   ResponseError,
   TimeoutError,
-  Serialize,
   serialize,
   request,
   create,

tsconfig.json

@@ -1,11 +1,11 @@
 {
   "compilerOptions": {
-    "target": "es6",
-    "lib": ["es2017", "es6", "dom"],
+    "target": "es2020",
     "module": "Node16",
     "moduleResolution": "Node16",
     "esModuleInterop": true,
     "skipLibCheck": true,
+    "isolatedModules": true,
 
     /* Linting */
     "strict": true,