message: Improve README about visual studio versions required
diff: @@ -120,9 +120,9 @@ You need to have installed OS X >=10.8 and xcode >=4.5
  ### Windows
  -If installing using a prebuilt binary you only need to have the [visual c++ 2013 runtime library](https://www.microsoft.com/en-us/download/details.aspx?id=40784).
  +If installing using a prebuilt binary you only need to have the [visual c++ 2015 runtime library](https://www.microsoft.com/en-us/download/details.aspx?id=40784).
  If building from source, you need to have Python 2.7 and
  -[Visual Studio >=2013](http://www.visualstudio.com/downloads/download-visual-studio-vs), you can get all that by running:
  +[Visual Studio >= 2015](http://www.visualstudio.com/downloads/download-visual-studio-vs), you can get all that by running:
  ```sh
  npm install --global --production windows-build-tools
  ```
  