Point package.json "types" field to generated .d.ts instead of raw .ts

.npmignore

@@ -12,6 +12,7 @@ jest.config.js
 nodemon.json
 
 example
+src
 tests
 test
 CHANGELOG.md

package.json

@@ -15,7 +15,7 @@
     "import": "./dist/index.js",
     "default": "./dist/index.js"
   },
-  "types": "./src/index.ts",
+  "types": "./dist/index.d.ts",
   "keywords": [
     "elysia",
     "swagger"