title: How to list all repositories for a given topic with REST API in GitHub?
body: <p>I would like to update a README.md with a list of all repositories for a topic.
  Before to write and update with a commit the change (automatically with a script)
  <strong>I would like to get all the string with repo URL for a given topic. I will save the date of each execution of the script.</strong></p>
  
  <p>I've found a method to get all topics of a repository, not all the repository for a topic : <a href="https://developer.github.com/v3/repos/#list-all-topics-for-a-repository" rel="nofollow noreferrer">https://developer.github.com/v3/repos/#list-all-topics-for-a-repository</a> in API V3</p>
  
  <p>Moreover, it seems there is "related topic" or similar topic with synonymous or different typo. </p>
  
  <p>Example :
  <a href="https://github.com/search?q=abap&amp;type=Topics" rel="nofollow noreferrer">https://github.com/search?q=abap&amp;type=Topics</a></p>
  
  <p>How could I get all the repo URL for a given topic (and its related topics) in order to update a readme.me file and (with a view to identify new repo) ?</p>