fix(package): optimise package files

Author: JanSzewczyk

README.md

@@ -64,7 +64,7 @@ yarn add -D prettier @szum-tech/prettier-config
 
 ## Set configuration
 
-Full documentation on how to create a Prettier configuration can be found [here](https://prettier.io/docs/en/configuration.html). 
+Full documentation on how to create a Prettier configuration can be found [here](https://prettier.io/docs/en/configuration.html).
 
 Below are the recommended ways to add it:
 

package.json

@@ -19,6 +19,9 @@
   "license": "MIT",
   "author": "Szum-Tech <szum.tech@gmail.com>",
   "main": "index.js",
+  "files": [
+    "index.js"
+  ],
   "scripts": {
     "prettier:check": "prettier --check .",
     "prettier:write": "prettier --write ."