fix(types): move types in types folder

Author: mvrlin

package.json

@@ -7,7 +7,7 @@
     "Pooya Parsa <[email protected]>"
   ],
   "main": "lib/module.js",
-  "types": "index.d.ts",
+  "types": "types/index.d.ts",
   "repository": "https://github.com/nuxt-community/axios-module",
   "publishConfig": {
     "access": "public"
@@ -20,7 +20,7 @@
   },
   "files": [
     "lib",
-    "index.d.ts"
+    "types/*.d.ts"
   ],
   "dependencies": {
     "@nuxtjs/proxy": "^1.3.1",