Version 0.2.6

* reset button state from 'loading...' after failed login attempt
  (#4231)
* use https sources in Gemfiles and documentation(#4109)
* include Gemfile.lock to prevent unintended updates (#4174)
* fixed download urls to get latest versions for mac, android and
  windows
* test api login with umlauts in password

lib/leap_web/version.rb

 module LeapWeb
-  VERSION = "0.2.5" unless defined?(LeapWeb::VERSION)
+  VERSION = "0.2.6" unless defined?(LeapWeb::VERSION)
 end