Searchlight weekly report - Stein R-23

The week after Stein-1 milestone is a little bit quiet. There are only some trivial fix on spec typos, tox version, etc. 

The main target of Stein-2 milestone for Searchlight is to develop the use cases so that Searchlight can attract more users as well as contributors. The effort is lead by Thuy Dang [1]. Also, we need to keep up with the community's goal, the upgrade checker. The effort is being processed by the goal's champion [2]. I will review and merge the patch this week if it goes well.