Fix typo, url and publish on npmjs

packages/provider/README.md

 # Provider Web Component
 
-[GitLab Repository](git@gitlab.tugraz.at:dbp/web-components/toolkit.git)
+[GitLab Repository](https://gitlab.tugraz.at/dbp/web-components/toolkit)
 
 You can install this component via npm:
 

packages/provider/package.json

@@ -4,7 +4,6 @@
   "version": "0.1.0",
   "main": "src/index.js",
   "license": "LGPL-2.1-or-later",
-  "private": true,
   "repository": {
     "type" : "git",
     "url" : "https://gitlab.tugraz.at/dbp/web-components/toolkit.git",

packages/provider/src/dbp-provider-demo.js

@@ -49,7 +49,7 @@ class ProviderDemo extends ScopedElementsMixin(LitElement) {
     render() {
         return html`
             <section class="section">
-                <p>Provider <em>"root"</em> is the top most in hirachy:</p>
+                <p>Provider <em>"root"</em> is the top most in hierarchy:</p>
                 <dbp-provider id="root"
                               init="availability=global"
                 ></dbp-provider>