CompatHelper: add new compat entry for "Plots" at version "1.15"#9

github-actions[bot] wants to merge 1 commit intomasterSimonCoste/LineIntersections:masterfrom

compathelper/new_version/2021-05-18-00-54-45-353-3327564885SimonCoste/LineIntersections:compathelper/new_version/2021-05-18-00-54-45-353-3327564885Copy head branch name to clipboard