feat(pkg)!: add exports field

Author: pi0

package.json

@@ -5,9 +5,15 @@
   "repository": "nuxt-contrib/is-https",
   "license": "MIT",
   "sideEffects": false,
-  "main": "dist/index.js",
-  "module": "dist/index.mjs",
-  "types": "dist/index.d.ts",
+  "exports": {
+    ".": {
+      "require": "./dist/index.js",
+      "import": "./dist/index.mjs"
+    }
+  },
+  "main": "./dist/index.js",
+  "module": "./dist/index.mjs",
+  "types": "./dist/index.d.ts",
   "files": [
     "dist"
   ],