bump version to 0.3.0

Author: tofi86

init.rb

@@ -2,7 +2,7 @@
   name 'Code Highlight plugin'
   author 'Jan Jezek'
   description 'This is a plugin for Redmine. It adds a CodeHighlight Button to the editor, which wraps a code around selected text'
-  version '0.2.0'
+  version '0.3.0'
   url 'https://github.com/mediatainment/redmine-codebutton'
   author_url 'http://www.mediatainment-productions.com'