Bump version to 2.0.0 🎉 and update changelog.

Author: microbit-carlos

CHANGELOG

@@ -1,3 +1,9 @@
+2.0.0
+-----
+* Added Croatian language 🇭🇷 (#294)
+* Update help file with latest v2 UI changes (#292)
+* Internationalisation internal improvements (#287) (#293)
+* WebUSB internal improvements and fixes (#289) (#291)
 
 2.0.0-rc.1
 ----------

editor.html

@@ -78,7 +78,7 @@
         </script>
         <script type="application/javascript">
             // VERSION INFORMATION
-            EDITOR_VERSION = "2.0.0-rc.1";
+            EDITOR_VERSION = "2.0.0";
             UPY_VERSION = "1.0.1";
         </script>
         <script id="files-template" type="x-tmpl-mustache">