Bump version to 2.1.0-beta.6 🎉 and update changelog.

Author: microbit-carlos

CHANGELOG

@@ -1,3 +1,9 @@
+2.1.0-beta.6
+------------
+* Update the MicroPython version to commit 3e09245a46
+* Add a message on the WebUSB modal when a full flash is performed
+* Other minor bug fixes
+
 2.1.0-beta.5
 ------------
 * Adds support for the new micro:bit

editor.html

@@ -78,7 +78,7 @@
         </script>
         <script type="application/javascript">
             // VERSION INFORMATION
-            EDITOR_VERSION = "2.1.0-beta.5";
+            EDITOR_VERSION = "2.1.0-beta.6";
             UPY_VERSION = "1.0.1/2.0-3e09245a46";
         </script>
         <script id="files-template" type="x-tmpl-mustache">