reduce package size (#112)

* Use package `files` instead of `.npmignore

* add dist/ folder to files for direct cdn link purposes

Co-authored-by: Estevan Maito <ejmaito@gmail.com>

Author: RobinMalfait

.npmignore

@@ -3,6 +3,10 @@
   "version": "0.3.1",
   "description": "A Tailwind CSS plugin for automatically styling plain HTML content with beautiful typographic defaults.",
   "main": "src/index.js",
+  "files": [
+    "src/*.js",
+    "dist/"
+  ],
   "repository": "https://github.com/tailwindcss/typography",
   "license": "MIT",
   "publishConfig": {