Convert pic to url when you paste a pic in clipboard to editor by Ctrl+V or drag some pics into editor
This script is refactored from the script https://greasyfork.org/en/scripts/389667-stackedit-pictourl, and its github link is https://github.com/A-23187/StackEdit-PicToUrl. Thanks to author @A23187.
However, it is not available due to sm.ms website changes its protocol.
I refactored it and add two more options: gitee (unavailable now); gitlab (available).
Users must register their own tokens, and input it to the first 3 lines of this script. Users can select the options directly from Tampermonkey or Violentmonkey. 
